Jennifer Walsh1, Michael Foley, Colm O'Herlihy. 1. Department of Obstetrics and Gynecology, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland. jennifer.walsh@ucd.ie
Abstract
OBJECTIVE: To assess the influence of body mass index (BMI) on labor outcome in both induced and actively managed spontaneous nulliparous labors. METHODS: This is a prospective observational study of all consecutive nulliparous women who delivered in the National Maternity Hospital, Dublin in 2008. Labor outcome variables examined in relation to BMI included duration of labor, oxytocin requirements, epidural use, mode of delivery, and infant birthweight. RESULTS: Of 4162 nulliparous women who labored during the study period, accurate BMI data were available on 3158, who constituted the study group. Of these women, 2143 (68%) were in spontaneous labor and 1015 (32%) had labor induced. A statistically significant association was found between maternal BMI at first antenatal visit and the need for intrapartum cesarean section (CS) in both spontaneous and induced labors (p < 0.05). A significantly poorer response to oxytocin augmentation was observed in women with a higher BMI, as indicated by an increased intrapartum CS rate for dystocia despite oxytocin augmentation. There was a linear relationship between maternal BMI and gestational age at onset of spontaneous labor. CONCLUSION: Our results in a large consecutive series of nulliparous labors confirm the potent influence of increasing maternal BMI on intrapartum events.
OBJECTIVE: To assess the influence of body mass index (BMI) on labor outcome in both induced and actively managed spontaneous nulliparous labors. METHODS: This is a prospective observational study of all consecutive nulliparous women who delivered in the National Maternity Hospital, Dublin in 2008. Labor outcome variables examined in relation to BMI included duration of labor, oxytocin requirements, epidural use, mode of delivery, and infant birthweight. RESULTS: Of 4162 nulliparous women who labored during the study period, accurate BMI data were available on 3158, who constituted the study group. Of these women, 2143 (68%) were in spontaneous labor and 1015 (32%) had labor induced. A statistically significant association was found between maternal BMI at first antenatal visit and the need for intrapartum cesarean section (CS) in both spontaneous and induced labors (p < 0.05). A significantly poorer response to oxytocin augmentation was observed in women with a higher BMI, as indicated by an increased intrapartum CS rate for dystocia despite oxytocin augmentation. There was a linear relationship between maternal BMI and gestational age at onset of spontaneous labor. CONCLUSION: Our results in a large consecutive series of nulliparous labors confirm the potent influence of increasing maternal BMI on intrapartum events.
Authors: Jun Zhang; D Ware Branch; Mildred M Ramirez; S Katherine Laughon; Uma Reddy; Mathew Hoffman; Jennifer Bailit; Michelle Kominiarek; Zhen Chen; Judith U Hibbard Journal: Obstet Gynecol Date: 2011-08 Impact factor: 7.623
Authors: Anna Sandström; Sven Cnattingius; Anna-Karin Wikström; Olof Stephansson; Anastasia N Iliadou Journal: PLoS One Date: 2015-10-14 Impact factor: 3.240
Authors: Louise Lundborg; Xingrong Liu; Katarina Åberg; Anna Sandström; Ellen L Tilden; Olof Stephansson; Mia Ahlberg Journal: Sci Rep Date: 2021-07-05 Impact factor: 4.379
Authors: Lin Zhang; James Troendle; D Ware Branch; Matthew Hoffman; Jun Yu; Lixia Zhou; Tao Duan; Jun Zhang Journal: PLoS One Date: 2018-10-31 Impact factor: 3.240