Risk of uterine rupture in women undergoing trial of labour with a history of both a caesarean section and a vaginal delivery. 2011

Hinke de Lau, and Hendrik Gremmels, and Nico W Schuitemaker, and Anneke Kwee
Department of Gynecology and Obstetrics, Diakonessenhuis Utrecht, Utrecht, Netherlands. h.delau@gmail.com

OBJECTIVE To determine the risk of uterine rupture for women undergoing trial of labour (TOL) with both a prior caesarean section (CS) and a vaginal delivery. METHODS A systematic literature search was performed using keywords for CS and uterine rupture. The results were critically appraised and the data from relevant and valid articles were extracted. Odds ratios were calculated and a pooled estimate was determined using the Mantel-Haenszel method. RESULTS Five studies were used for final analysis. Three studies showed a significant risk reduction for women with both a previous CS and a prior vaginal delivery (PVD) compared to women with a previous CS only, and two studies showed a trend towards risk reduction. The absolute risk of uterine rupture with a prior vaginal delivery varied from 0.17 to 0.46%. The overall odds ratio for PVD was 0.39 (95% CI 0.29-0.52, P < 0.00001). CONCLUSIONS Women with a history of both a CS and vaginal delivery are at decreased risk of uterine rupture when undergoing TOL compared with women who have only had a CS.

UI MeSH Term Description Entries
D007743 Labor, Obstetric The repetitive uterine contraction during childbirth which is associated with the progressive dilation of the uterine cervix (CERVIX UTERI). Successful labor results in the expulsion of the FETUS and PLACENTA. Obstetric labor can be spontaneous or induced (LABOR, INDUCED). Obstetric Labor
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D002585 Cesarean Section Extraction of the FETUS by means of abdominal HYSTEROTOMY. Abdominal Delivery,Delivery, Abdominal,C-Section (OB),Caesarean Section,Postcesarean Section,Abdominal Deliveries,C Section (OB),C-Sections (OB),Caesarean Sections,Cesarean Sections,Deliveries, Abdominal
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012306 Risk The probability that an event will occur. It encompasses a variety of measures of the probability of a generally unfavorable outcome. Relative Risk,Relative Risks,Risk, Relative,Risks,Risks, Relative
D014597 Uterine Rupture A complete separation or tear in the wall of the UTERUS with or without expulsion of the FETUS. It may be due to injuries, multiple pregnancies, large fetus, previous scarring, or obstruction. Rupture, Uterine,Ruptures, Uterine,Uterine Ruptures
D036861 Delivery, Obstetric Delivery of the FETUS and PLACENTA under the care of an obstetrician or a health worker. Obstetric deliveries may involve physical, psychological, medical, or surgical interventions. Obstetric Delivery,Deliveries, Obstetric,Obstetric Deliveries

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