{"id":"https://openalex.org/W2034047467","doi":"https://doi.org/10.1016/j.ajog.2009.08.003","title":"Second-stage labor duration in nulliparous women: relationship to maternal and perinatal outcomes","display_name":"Second-stage labor duration in nulliparous women: relationship to maternal and perinatal outcomes","publication_year":2009,"publication_date":"2009-09-27","ids":{"openalex":"https://openalex.org/W2034047467","doi":"https://doi.org/10.1016/j.ajog.2009.08.003","mag":"2034047467","pmid":"https://pubmed.ncbi.nlm.nih.gov/19788967","pmcid":"https://www.ncbi.nlm.nih.gov/pmc/articles/2768280"},"language":"en","primary_location":{"id":"doi:10.1016/j.ajog.2009.08.003","doi":"https://doi.org/10.1016/j.ajog.2009.08.003","is_oa":false,"landing_page_url":"https://doi.org/10.1016/j.ajog.2009.08.003","pdf_url":null,"source":{"id":"https://openalex.org/S122347013","display_name":"American Journal of Obstetrics and Gynecology","issn_l":"0002-9378","issn":["0002-9378","1085-8709","1097-6868"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","doyens","jufo-3","ki-jl-3","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Obstetrics and Gynecology","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","datacite","pubmed"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2768280","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5103463156","display_name":"Dwight J. Rouse","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I32389192","display_name":"University of Alabama at Birmingham","ror":"https://ror.org/008s83205","country_code":"US","type":"education","lineage":["https://openalex.org/I32389192"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Dwight J. Rouse","raw_affiliation_strings":["Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL, USA","Department of Obstetrics and Gynecology at the University of Alabama at Birmingham, Birmingham, AL"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL, USA","institution_ids":["https://openalex.org/I32389192"]},{"raw_affiliation_string":"Department of Obstetrics and Gynecology at the University of Alabama at Birmingham, Birmingham, AL","institution_ids":["https://openalex.org/I32389192"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5052653024","display_name":"Steven J. Weiner","orcid":"https://orcid.org/0000-0001-5953-673X","observed_orcids":["https://orcid.org/0000-0001-5953-673X"]},"institutions":[{"id":"https://openalex.org/I193531525","display_name":"George Washington University","ror":"https://ror.org/00y4zzh67","country_code":"US","type":"education","lineage":["https://openalex.org/I193531525"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Steven J. Weiner","raw_affiliation_strings":["Department of Obstetrics and Gynecology, The George Washington University Biostatistics Center, Washington, DC"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, The George Washington University Biostatistics Center, Washington, DC","institution_ids":["https://openalex.org/I193531525"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109322079","display_name":"Steven L. Bloom","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I867280407","display_name":"The University of Texas Southwestern Medical Center","ror":"https://ror.org/05byvp690","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I867280407"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Steven L. Bloom","raw_affiliation_strings":["Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX","institution_ids":["https://openalex.org/I867280407"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081067500","display_name":"Michael Walter Varner","orcid":"https://orcid.org/0000-0001-9455-3973","observed_orcids":["https://orcid.org/0000-0001-9455-3973"]},"institutions":[{"id":"https://openalex.org/I223532165","display_name":"University of Utah","ror":"https://ror.org/03r0ha626","country_code":"US","type":"education","lineage":["https://openalex.org/I223532165"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Michael W. Varner","raw_affiliation_strings":["Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT","institution_ids":["https://openalex.org/I223532165"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103547459","display_name":"Catherine Y. Spong","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1299303238","display_name":"National Institutes of Health","ror":"https://ror.org/01cwqze88","country_code":"US","type":"government","lineage":["https://openalex.org/I1299022934","https://openalex.org/I1299303238"]},{"id":"https://openalex.org/I4210111403","display_name":"Eunice Kennedy Shriver Center","ror":"https://ror.org/01v2b1j25","country_code":"US","type":"facility","lineage":["https://openalex.org/I166722992","https://openalex.org/I4210111403"]},{"id":"https://openalex.org/I4210144228","display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development","ror":"https://ror.org/04byxyr05","country_code":"US","type":"facility","lineage":["https://openalex.org/I1299022934","https://openalex.org/I1299303238","https://openalex.org/I4210144228"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Catherine Y. Spong","raw_affiliation_strings":["Department of Obstetrics and Gynecology,","Eunice Kennedy Shriver","National Institute of Child Health and Human Development, Bethesda, MD"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology,","institution_ids":[]},{"raw_affiliation_string":"Eunice Kennedy Shriver","institution_ids":["https://openalex.org/I4210111403"]},{"raw_affiliation_string":"National Institute of Child Health and Human Development, Bethesda, MD","institution_ids":["https://openalex.org/I1299303238","https://openalex.org/I4210144228"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111912308","display_name":"Susan M. Ramin","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I919571938","display_name":"The University of Texas Health Science Center at Houston","ror":"https://ror.org/03gds6c39","country_code":"US","type":"education","lineage":["https://openalex.org/I919571938"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Susan M. Ramin","raw_affiliation_strings":["Department of Obstetrics and Gynecology, The University of Texas Health Science Center at Houston, Houston, TX"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, The University of Texas Health Science Center at Houston, Houston, TX","institution_ids":["https://openalex.org/I919571938"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5061152811","display_name":"Steve N. Caritis","orcid":"https://orcid.org/0000-0002-2169-0712","observed_orcids":["https://orcid.org/0000-0002-2169-0712"]},"institutions":[{"id":"https://openalex.org/I170201317","display_name":"University of Pittsburgh","ror":"https://ror.org/01an3r305","country_code":"US","type":"education","lineage":["https://openalex.org/I170201317"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Steve N. Caritis","raw_affiliation_strings":["Department of Obstetrics and Gynecology, University of Pittsburgh, Pittsburgh, PA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, University of Pittsburgh, Pittsburgh, PA","institution_ids":["https://openalex.org/I170201317"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017433834","display_name":"Alan M. Peaceman","orcid":"https://orcid.org/0000-0002-4515-4850","observed_orcids":["https://orcid.org/0000-0002-4515-4850"]},"institutions":[{"id":"https://openalex.org/I111979921","display_name":"Northwestern University","ror":"https://ror.org/000e0be47","country_code":"US","type":"education","lineage":["https://openalex.org/I111979921"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Alan M. Peaceman","raw_affiliation_strings":["Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL","institution_ids":["https://openalex.org/I111979921"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5105357815","display_name":"Yoram Sorokin","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I185443292","display_name":"Wayne State University","ror":"https://ror.org/01070mq45","country_code":"US","type":"education","lineage":["https://openalex.org/I185443292"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Yoram Sorokin","raw_affiliation_strings":["Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI","institution_ids":["https://openalex.org/I185443292"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012999532","display_name":"ANTHONY C. SCISCIONE","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I114027177","display_name":"University of North Carolina at Chapel Hill","ror":"https://ror.org/0130frc33","country_code":"US","type":"education","lineage":["https://openalex.org/I114027177"]},{"id":"https://openalex.org/I170201317","display_name":"University of Pittsburgh","ror":"https://ror.org/01an3r305","country_code":"US","type":"education","lineage":["https://openalex.org/I170201317"]},{"id":"https://openalex.org/I223532165","display_name":"University of Utah","ror":"https://ror.org/03r0ha626","country_code":"US","type":"education","lineage":["https://openalex.org/I223532165"]},{"id":"https://openalex.org/I32389192","display_name":"University of Alabama at Birmingham","ror":"https://ror.org/008s83205","country_code":"US","type":"education","lineage":["https://openalex.org/I32389192"]},{"id":"https://openalex.org/I4210144228","display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development","ror":"https://ror.org/04byxyr05","country_code":"US","type":"facility","lineage":["https://openalex.org/I1299022934","https://openalex.org/I1299303238","https://openalex.org/I4210144228"]},{"id":"https://openalex.org/I72816309","display_name":"Drexel University","ror":"https://ror.org/04bdffz58","country_code":"US","type":"education","lineage":["https://openalex.org/I72816309"]},{"id":"https://openalex.org/I867280407","display_name":"The University of Texas Southwestern Medical Center","ror":"https://ror.org/05byvp690","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I867280407"]},{"id":"https://openalex.org/I919571938","display_name":"The University of Texas Health Science Center at Houston","ror":"https://ror.org/03gds6c39","country_code":"US","type":"education","lineage":["https://openalex.org/I919571938"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Anthony Sciscione","raw_affiliation_strings":["Departments of Obstetrics and Gynecology at the University of Alabama at Birmingham, Birmingham, AL (D.J.R.); The George Washington University Biostatistics Center, Washington, DC (S.J.W.); University of Texas Southwestern Medical Center, Dallas, TX (S.L.B.); University of Utah, Salt Lake City, UT (M.W.V.); Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD (C.Y.S.); The University of Texas Health Science Center at Houston, Houston, TX (S.M.R.); University of Pittsburgh, Pittsburgh, PA (S.N.C.); Northwestern University, Chicago, IL (A.M.P.); Wayne State University, Detroit, MI (Y.S.); Drexel University, Philadelphia, PA (A.S.); Brown University, Providence, RI (M.W.C.); Case Western Reserve University, Cleveland, OH (B.M.M.); University of North Carolina at Chapel Hill, Chapel Hill, NC (J.M.T.); Columbia University, New York, NY (F.D.M.); Wake Forest University Health Sciences, Winston-Salem, NC (M.H.); The Ohio State University, Columbus, OH","Department of Obstetrics and Gynecology, Drexel University, Philadelphia, PA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Departments of Obstetrics and Gynecology at the University of Alabama at Birmingham, Birmingham, AL (D.J.R.); The George Washington University Biostatistics Center, Washington, DC (S.J.W.); University of Texas Southwestern Medical Center, Dallas, TX (S.L.B.); University of Utah, Salt Lake City, UT (M.W.V.); Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD (C.Y.S.); The University of Texas Health Science Center at Houston, Houston, TX (S.M.R.); University of Pittsburgh, Pittsburgh, PA (S.N.C.); Northwestern University, Chicago, IL (A.M.P.); Wayne State University, Detroit, MI (Y.S.); Drexel University, Philadelphia, PA (A.S.); Brown University, Providence, RI (M.W.C.); Case Western Reserve University, Cleveland, OH (B.M.M.); University of North Carolina at Chapel Hill, Chapel Hill, NC (J.M.T.); Columbia University, New York, NY (F.D.M.); Wake Forest University Health Sciences, Winston-Salem, NC (M.H.); The Ohio State University, Columbus, OH","institution_ids":["https://openalex.org/I114027177","https://openalex.org/I170201317","https://openalex.org/I223532165","https://openalex.org/I32389192","https://openalex.org/I4210144228","https://openalex.org/I867280407","https://openalex.org/I919571938"]},{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Drexel University, Philadelphia, PA","institution_ids":["https://openalex.org/I72816309"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109587869","display_name":"Marshall W. Carpenter","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I27804330","display_name":"Brown University","ror":"https://ror.org/05gq02987","country_code":"US","type":"education","lineage":["https://openalex.org/I27804330"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Marshall W. Carpenter","raw_affiliation_strings":["Department of Obstetrics and Gynecology, Brown University, Providence, RI"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Brown University, Providence, RI","institution_ids":["https://openalex.org/I27804330"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5105367618","display_name":"Brian M. Mercer","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I58956616","display_name":"Case Western Reserve University","ror":"https://ror.org/051fd9666","country_code":"US","type":"education","lineage":["https://openalex.org/I58956616"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Brian M. Mercer","raw_affiliation_strings":["Department of Obstetrics and Gynecology, Case Western Reserve University, Cleveland, OH"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Case Western Reserve University, Cleveland, OH","institution_ids":["https://openalex.org/I58956616"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5009709588","display_name":"John M. Thorp","orcid":"https://orcid.org/0000-0002-4598-0271","observed_orcids":["https://orcid.org/0000-0002-4598-0271"]},"institutions":[{"id":"https://openalex.org/I114027177","display_name":"University of North Carolina at Chapel Hill","ror":"https://ror.org/0130frc33","country_code":"US","type":"education","lineage":["https://openalex.org/I114027177"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"John M. Thorp","raw_affiliation_strings":["Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC","institution_ids":["https://openalex.org/I114027177"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5030836937","display_name":"Fergal Desmond Malone","orcid":"https://orcid.org/0009-0003-4313-4594","observed_orcids":["https://orcid.org/0009-0003-4313-4594"]},"institutions":[{"id":"https://openalex.org/I78577930","display_name":"Columbia University","ror":"https://ror.org/00hj8s172","country_code":"US","type":"education","lineage":["https://openalex.org/I78577930"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Fergal D. Malone","raw_affiliation_strings":["Department of Obstetrics and Gynecology, Columbia University, New York, NY"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Columbia University, New York, NY","institution_ids":["https://openalex.org/I78577930"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5041781866","display_name":"Margaret Harper","orcid":"https://orcid.org/0000-0002-7902-6486","observed_orcids":["https://orcid.org/0000-0002-7902-6486"]},"institutions":[{"id":"https://openalex.org/I4405269449","display_name":"Wake Forest University Health Sciences","ror":"https://ror.org/046r1r105","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I4405269449","https://openalex.org/I47251452"]},{"id":"https://openalex.org/I47251452","display_name":"Wake Forest University","ror":"https://ror.org/0207ad724","country_code":"US","type":"education","lineage":["https://openalex.org/I47251452"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Margaret Harper","raw_affiliation_strings":["Department of Obstetrics and Gynecology, Wake Forest University Health Sciences, Winston-Salem, NC"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, Wake Forest University Health Sciences, Winston-Salem, NC","institution_ids":["https://openalex.org/I4405269449","https://openalex.org/I47251452"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010448524","display_name":"Jay D. Iams","orcid":"https://orcid.org/0000-0001-7116-9004","observed_orcids":["https://orcid.org/0000-0001-7116-9004"]},"institutions":[{"id":"https://openalex.org/I52357470","display_name":"The Ohio State University","ror":"https://ror.org/00rs6vg23","country_code":"US","type":"education","lineage":["https://openalex.org/I52357470"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jay D. Iams","raw_affiliation_strings":["Department of Obstetrics and Gynecology, The Ohio State University, Columbus, OH"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, The Ohio State University, Columbus, OH","institution_ids":["https://openalex.org/I52357470"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5110860756","display_name":"Garland D. Anderson","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I55302922","display_name":"The University of Texas Medical Branch at Galveston","ror":"https://ror.org/016tfm930","country_code":"US","type":"education","lineage":["https://openalex.org/I55302922"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Garland D. Anderson","raw_affiliation_strings":["Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX","institution_ids":["https://openalex.org/I55302922"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":20,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":5410,"currency":"USD","value_usd":5410},"apc_paid":null,"fwci":7.1558,"has_fulltext":true,"cited_by_count":258,"citation_normalized_percentile":{"value":0.96807838,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":96,"max":100},"biblio":{"volume":"201","issue":"4","first_page":"357.e1","last_page":"357.e7"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10453","display_name":"Maternal and Perinatal Health Interventions","score":0.9980000257492065,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10453","display_name":"Maternal and Perinatal Health Interventions","score":0.9980000257492065,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11389","display_name":"Maternal and fetal healthcare","score":0.0003000000142492354,"subfield":{"id":"https://openalex.org/subfields/2735","display_name":"Pediatrics, Perinatology and Child Health"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11290","display_name":"Preterm Birth and Chorioamnionitis","score":0.00019999999494757503,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/nulliparous-women","display_name":"nulliparous women","score":0.9919999837875366},{"id":"https://openalex.org/keywords/normal-vaginal-delivery","display_name":"normal delivery","score":0.7919999957084656},{"id":"https://openalex.org/keywords/chorioamnionitis","display_name":"chorioamnionitis","score":0.953000009059906},{"id":"https://openalex.org/keywords/perineal-tears","display_name":"perineal tears","score":0.9449999928474426},{"id":"https://openalex.org/keywords/uterine-atony","display_name":"uterine atony","score":0.9980000257492065},{"id":"https://openalex.org/keywords/neonatal-intensive-care-unit-admission","display_name":"neonatal intensive care admission","score":0.9470000267028809},{"id":"https://openalex.org/keywords/fetal-pulse-oximetry","display_name":"fetal pulse oximetry","score":0.7559999823570251},{"id":"https://openalex.org/keywords/adverse-maternal-outcomes","display_name":"adverse maternal outcomes","score":0.6019999980926514},{"id":"https://openalex.org/keywords/adverse-neonatal-outcomes","display_name":"adverse neonatal outcomes","score":0.8610000014305115}],"concepts":[{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.9378629922866821},{"id":"https://openalex.org/C131872663","wikidata":"https://www.wikidata.org/wiki/Q5284418","display_name":"Obstetrics","level":1,"score":0.740868866443634},{"id":"https://openalex.org/C112758219","wikidata":"https://www.wikidata.org/wiki/Q16038819","display_name":"Duration (music)","level":2,"score":0.7246668934822083},{"id":"https://openalex.org/C146357865","wikidata":"https://www.wikidata.org/wiki/Q1123245","display_name":"Stage (stratigraphy)","level":2,"score":0.6106339693069458},{"id":"https://openalex.org/C2779234561","wikidata":"https://www.wikidata.org/wiki/Q11995","display_name":"Pregnancy","level":2,"score":0.4491250514984131},{"id":"https://openalex.org/C29456083","wikidata":"https://www.wikidata.org/wiki/Q1221899","display_name":"Gynecology","level":1,"score":0.35963380336761475},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C124952713","wikidata":"https://www.wikidata.org/wiki/Q8242","display_name":"Literature","level":1,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C142362112","wikidata":"https://www.wikidata.org/wiki/Q735","display_name":"Art","level":0,"score":0.0},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.0}],"mesh":[{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001720","descriptor_name":"Birth Injuries","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":false},{"descriptor_ui":"D001917","descriptor_name":"Brachial Plexus","qualifier_ui":"Q000293","qualifier_name":"injuries","is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007363","descriptor_name":"Intensive Care Units, Neonatal","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007748","descriptor_name":"Labor Stage, Second","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D010298","descriptor_name":"Parity","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D011247","descriptor_name":"Pregnancy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D011256","descriptor_name":"Pregnancy Outcome","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D012307","descriptor_name":"Risk Factors","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D013997","descriptor_name":"Time Factors","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015337","descriptor_name":"Multicenter Studies as Topic","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D016032","descriptor_name":"Randomized Controlled Trials as Topic","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":6,"locations":[{"id":"doi:10.1016/j.ajog.2009.08.003","doi":"https://doi.org/10.1016/j.ajog.2009.08.003","is_oa":false,"landing_page_url":"https://doi.org/10.1016/j.ajog.2009.08.003","pdf_url":null,"source":{"id":"https://openalex.org/S122347013","display_name":"American Journal of Obstetrics and Gynecology","issn_l":"0002-9378","issn":["0002-9378","1085-8709","1097-6868"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","doyens","jufo-3","ki-jl-3","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Obstetrics and Gynecology","raw_type":"journal-article"},{"id":"pmid:19788967","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/19788967","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American journal of obstetrics and gynecology","raw_type":"Journal Article"},{"id":"pmh:oai:pubmedcentral.nih.gov:2768280","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2768280","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"Am J Obstet Gynecol","raw_type":"Text"},{"id":"pmh:cdr.lib.unc.edu:j3860d80t","doi":null,"is_oa":true,"landing_page_url":"https://doi.org/10.17615/qm8a-1r72","pdf_url":"https://cdr.lib.unc.edu/downloads/pk02ch77r","source":{"id":"https://openalex.org/S4306401075","display_name":"Carolina Digital Repository (University of North Carolina at Chapel Hill)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I114027177","host_organization_name":"University of North Carolina at Chapel Hill","host_organization_lineage":["https://openalex.org/I114027177"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"American Journal of Obstetrics and Gynecology, 201(4)","raw_type":"Article"},{"id":"pmh:oai:www.lenus.ie:10147/128406","doi":null,"is_oa":false,"landing_page_url":"http://hdl.handle.net/10147/128406","pdf_url":null,"source":{"id":"https://openalex.org/S4306401756","display_name":"Lenus, The Irish Health Repository (Dr Steevens Hospital Library)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Article"},{"id":"doi:10.17615/qm8a-1r72","doi":"https://doi.org/10.17615/qm8a-1r72","is_oa":true,"landing_page_url":"https://doi.org/10.17615/qm8a-1r72","pdf_url":null,"source":{"id":"https://openalex.org/S7407051488","display_name":"UNC Libraries","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article-journal"}],"best_oa_location":{"id":"pmh:oai:pubmedcentral.nih.gov:2768280","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2768280","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"Am J Obstet Gynecol","raw_type":"Text"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","score":0.9940000176429749,"display_name":"Good health and well-being"}],"study_designs":[],"awards":[{"id":"https://openalex.org/G1216570417","display_name":null,"funder_award_id":"HD40512","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G1230928255","display_name":"Carolina Population Center","funder_award_id":"2r24hd050924-06","funder_id":"https://openalex.org/F4320332161","funder_display_name":"National Institutes of Health"},{"id":"https://openalex.org/G1772718446","display_name":"Maternal Fetal Medicine Network: Data Coordinating Cent*","funder_award_id":"U01HD036801","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G1789099407","display_name":null,"funder_award_id":"R24 HD-050924","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G2008310783","display_name":"Eunice Kennedy Shriver NICHD Maternal Fetal Medicine Units Network","funder_award_id":"U10HD040544","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G2017984514","display_name":"Maternal Fetal Medicine Units Network","funder_award_id":"U10HD034208","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G2254024324","display_name":null,"funder_award_id":"HD-27915","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G2521875762","display_name":"NICHD Maternal Fetal Medicine Units Network","funder_award_id":"U10HD040512","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G2594613454","display_name":null,"funder_award_id":"HD34116","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G2749437632","display_name":"NICHD Maternal-Fetal Medicine Units (MFMU) Network","funder_award_id":"UG1HD034116","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G284963502","display_name":null,"funder_award_id":"HD40545","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G29782494","display_name":null,"funder_award_id":"(HD40500","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G3173015552","display_name":"NICHD Maternal Fetal Medicine Units Network","funder_award_id":"U10HD027915","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G3693499331","display_name":"Eunice Kennedy Shriver NICHD Maternal Fetal Medicine Units Network","funder_award_id":"U10HD040545","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G3756884834","display_name":"Cooperative Multicenter Maternal Fetal Medicine Units Networks","funder_award_id":"U10HD040560","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G3786447104","display_name":null,"funder_award_id":"HD 40544","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G4027080872","display_name":null,"funder_award_id":"HD40560","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G4253433075","display_name":"Co-Operative Multicenter Trials in Obstetrics & Maternal Fetal Medicine","funder_award_id":"U10HD027917","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G4268881650","display_name":"Data Coord Ctr-NICHD Cooperative Multicenter Maternal Medicine Units Research Net","funder_award_id":"U10HD036801","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G4388853518","display_name":"MULTICENTER NETWORK OF MATERNAL-FETAL MEDICINE UNITS","funder_award_id":"U10HD027860","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G4485626989","display_name":"Multicenter Network of Maternal Fetal Medicine Units","funder_award_id":"U10HD021410","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G4657398957","display_name":null,"funder_award_id":"HD 34208","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G50908112","display_name":null,"funder_award_id":"HD 36801","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G640751050","display_name":"Eunice Kennedy Shriver NICHD Maternal Fetal Medicine Units Network (U10)","funder_award_id":"U10HD034116","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G6657596466","display_name":null,"funder_award_id":"HD27869","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G673807916","display_name":null,"funder_award_id":"[HD21410","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G6783807317","display_name":"Brown/WIH Eunice Kennedy Shriver NICHD MFM Units Network Site","funder_award_id":"U10HD040500","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G7111592080","display_name":"Maternal Fetal Medicine Network","funder_award_id":"U10HD040485","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G8147661291","display_name":"NICHD Materal Fetal Medicine Units Network","funder_award_id":"U10HD027869","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G8331706062","display_name":"MULTICENTER NETWORK OF MATERNAL-FETAL MEDICINE UNITS","funder_award_id":"U10HD034136","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000870049","display_name":"UofU Maternal-Fetal Medicine Units (MFMU) Network: Clinical Centers","funder_award_id":"UG1HD034208","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000876716","display_name":"NICHD Maternal-Fetal Medicine Units (MFMU) Network: Data CoordinatingCenter","funder_award_id":"U24HD036801","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000879348","display_name":"Brown University/Women & Infants Hospital of Rhode Island (WIH) Center Application for the Eunice Kennedy Shriver NICHD Maternal Fetal Medicine Units Network","funder_award_id":"UG1HD040500","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000887906","display_name":"Maternal Fetal Medicine Units Network - Northwestern Study Center","funder_award_id":"UG1HD040512","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000889471","display_name":"Maternal-Fetal Medicine Units (MFMU) Network","funder_award_id":"UG1HD027869","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000907722","display_name":"Case Western Reserve University Center of the NICHD MFMU Network","funder_award_id":"UG1HD040544","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000911223","display_name":"Columbia University Maternal-Fetal Medicine Units Network Clinical Center","funder_award_id":"UG1HD040485","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000912063","display_name":"NICHD maternal fetal medicine units network","funder_award_id":"UG1HD027915","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000912228","display_name":"UNC MFMU: Advancing Perinatal Health via Definitive, Multi-Site Clinical Studies","funder_award_id":"UG1HD040560","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G9000915956","display_name":"Eunice Kennedy Shriver NICHD Maternal-Fetal Medicine Units (MFMU) Network (UG1)","funder_award_id":"UG1HD040545","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"},{"id":"https://openalex.org/G922324195","display_name":null,"funder_award_id":"HD 40485","funder_id":"https://openalex.org/F4320337611","funder_display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development"}],"funders":[{"id":"https://openalex.org/F4320332161","display_name":"National Institutes of Health","ror":"https://ror.org/01cwqze88"},{"id":"https://openalex.org/F4320337611","display_name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development","ror":"https://ror.org/04byxyr05"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2034047467.pdf","grobid_xml":"https://content.openalex.org/works/W2034047467.grobid-xml"},"referenced_works_count":11,"referenced_works":["https://openalex.org/W47473133","https://openalex.org/W61706512","https://openalex.org/W135563936","https://openalex.org/W1990767220","https://openalex.org/W1997596111","https://openalex.org/W2006607282","https://openalex.org/W2058119598","https://openalex.org/W2064258119","https://openalex.org/W2075771583","https://openalex.org/W2106781834","https://openalex.org/W2125303424"],"related_works":["https://openalex.org/W2057765928","https://openalex.org/W2561459203","https://openalex.org/W2058119598","https://openalex.org/W2006607282","https://openalex.org/W2320178859","https://openalex.org/W4221003645","https://openalex.org/W3093757270","https://openalex.org/W2019225810","https://openalex.org/W2069993392","https://openalex.org/W135563936"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":11},{"year":2024,"cited_by_count":9},{"year":2023,"cited_by_count":14},{"year":2022,"cited_by_count":12},{"year":2021,"cited_by_count":14},{"year":2020,"cited_by_count":17},{"year":2019,"cited_by_count":19},{"year":2018,"cited_by_count":23},{"year":2017,"cited_by_count":78},{"year":2016,"cited_by_count":17},{"year":2015,"cited_by_count":9},{"year":2014,"cited_by_count":9},{"year":2013,"cited_by_count":3},{"year":2012,"cited_by_count":8}],"updated_date":"2026-11-06T12:05:46.655746","created_date":"2016-06-24T00:00:00"}
