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Longer latent phase duration was also associated with longer active phase and second stage. There were no associations between latent phase duration and risk for cesarean delivery or postpartum hemorrhage in a practice setting with relatively low rates of primary cesarean. Newborns born to multiparous women with latent phase of labor durations at and beyond the 80th% were more frequently admitted to the NICU (\u226580th% [compared with\u00a0&lt;\u00a080th%] aOR 2.7 [1.22\u20105.84]); however, two\u2010thirds of these NICU admissions were likely for observation only.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Longer duration of the spontaneous latent phase of labor among women with low\u2010risk pregnancies may signal longer total labor processes, leading to an increase in diagnosis of dystocia, interventions to manage dystocia, and epidural use. Apart from multiparous neonatal NICU admission, no other maternal or child morbidity outcomes were elevated with longer duration of the latent phase of labor.<\/jats:p><\/jats:sec>","DOI":"10.1111\/birt.12494","type":"journal-article","created":{"date-parts":[[2020,7,20]],"date-time":"2020-07-20T12:43:15Z","timestamp":1595248995000},"page":"418-429","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["The association between longer durations of the latent phase of labor and subsequent perinatal processes and outcomes among midwifery patients"],"prefix":"10.1111","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2457-1807","authenticated-orcid":false,"given":"Ellen L.","family":"Tilden","sequence":"first","affiliation":[{"name":"Department of Nurse\u2010Midwifery Oregon Health &amp; Science University School of Nursing Portland Oregon USA"},{"name":"Department of Obstetrics and Gynecology Oregon Health &amp; Science University Portland Oregon USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6549-094X","authenticated-orcid":false,"given":"Julia C.","family":"Phillippi","sequence":"additional","affiliation":[{"name":"Vanderbilt University School of Nursing Nashville Tennessee USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2642-9174","authenticated-orcid":false,"given":"Nicole","family":"Carlson","sequence":"additional","affiliation":[{"name":"Emory University Atlanta Georgia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3781-5444","authenticated-orcid":false,"given":"Mekhala","family":"Dissanayake","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Oregon Health &amp; Science University Portland Oregon USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher S.","family":"Lee","sequence":"additional","affiliation":[{"name":"Boston College School of Nursing Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aaron B.","family":"Caughey","sequence":"additional","affiliation":[{"name":"Department of Nurse\u2010Midwifery Oregon Health &amp; Science University School of Nursing Portland Oregon USA"},{"name":"Department of Obstetrics and Gynecology Oregon Health &amp; Science University Portland Oregon USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9566-3047","authenticated-orcid":false,"given":"Jonathan M.","family":"Snowden","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Oregon Health &amp; Science University Portland Oregon USA"},{"name":"School of Public Health Oregon Health &amp; Science University and Portland State University Portland Oregon USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,7,20]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/00006250-195512000-00001"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/jmwh.12355"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/00006250-195612000-00007"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00192-017-3416-2"},{"key":"e_1_2_5_6_1","first-page":"1","article-title":"Global, regional, and national levels and trends in maternal mortality between 1990 and 2015, with scenario\u2010based projections to 2030: a systematic analysis by the UN Maternal Mortality Estimation Inter\u2010Agency Group","volume":"15","author":"Alkema L","year":"2015","journal-title":"Lancet"},{"key":"e_1_2_5_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(16)31593-8"},{"key":"e_1_2_5_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2014.01.026"},{"key":"e_1_2_5_9_1","doi-asserted-by":"publisher","DOI":"10.1053\/j.semperi.2012.04.013"},{"key":"e_1_2_5_10_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamapediatrics.2016.2385"},{"key":"e_1_2_5_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2019.05.041"},{"key":"e_1_2_5_12_1","doi-asserted-by":"publisher","DOI":"10.1111\/birt.12428"},{"key":"e_1_2_5_13_1","first-page":"135","article-title":"Dysfunctional labor. 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