Lina Lindegren1,2, Andrea Stuart1, Andreas Herbst2, Karin Källén2. 1. Department of Obstetrics and Gynecology, Helsingborg Hospital, Helsingborg, Sweden. 2. Institution of Clinical Sciences, Department of Obstetrics and Gynecology, University of Lund, Lund, Sweden.
Abstract
INTRODUCTION: Prolonged pregnancies are associated with adverse maternal and fetal outcome. In Sweden, no national guidelines exist for when to induce prolonged pregnancies. MATERIAL AND METHODS: Singleton cephalic prolonged pregnancies (defined as ≥ 41+3 gestational weeks) during 2001-2013 (n = 199 770) were identified using the Swedish Medical Birth Register. The maternity units were divided into three groups (tertiles) based on the proportion of pregnancies ≥ 42+3 gestational weeks among all pregnancies ≥ 41+3 weeks. The pregnancy outcome among women delivered at the units with the most expectant management of prolonged pregnancies (> 17.6% proceeding to 42+3 weeks), was compared with that among women delivered at units with the most active management (< 12.6% proceeding to 42+3 weeks). Odds ratios (OR) were calculated using simple and multiple logistic regression. Adjustments were made for year of delivery, hospital level, maternal age, body mass index, and smoking. RESULTS: Among primiparas, an increased risk of Apgar score < 7 at 5 minutes [odds ratio (OR) 1.27, 95% CI 1.16-1.41] and meconium aspiration (OR 1.49, 95% CI 1.14-1.95) was found after birth at most expectant units compared with most active units, but among multiparas, no such associations were detected. A decreased rate of cesarean section was found for both primiparas (OR 0.83, 95% CI 0.80-0.86) and multiparas (OR 0.82, 95% CI 0.77-0.86) at units with expectant vs. active management. No association between perinatal death and delivery-unit specific management of prolonged pregnancies was detected. CONCLUSIONS: Offspring to primiparas might gain from a more active management of prolonged pregnancies, whereas no such improvement of neonatal outcome among multiparous women was detected.
INTRODUCTION: Prolonged pregnancies are associated with adverse maternal and fetal outcome. In Sweden, no national guidelines exist for when to induce prolonged pregnancies. MATERIAL AND METHODS: Singleton cephalic prolonged pregnancies (defined as ≥ 41+3 gestational weeks) during 2001-2013 (n = 199 770) were identified using the Swedish Medical Birth Register. The maternity units were divided into three groups (tertiles) based on the proportion of pregnancies ≥ 42+3 gestational weeks among all pregnancies ≥ 41+3 weeks. The pregnancy outcome among women delivered at the units with the most expectant management of prolonged pregnancies (> 17.6% proceeding to 42+3 weeks), was compared with that among women delivered at units with the most active management (< 12.6% proceeding to 42+3 weeks). Odds ratios (OR) were calculated using simple and multiple logistic regression. Adjustments were made for year of delivery, hospital level, maternal age, body mass index, and smoking. RESULTS: Among primiparas, an increased risk of Apgar score < 7 at 5 minutes [odds ratio (OR) 1.27, 95% CI 1.16-1.41] and meconium aspiration (OR 1.49, 95% CI 1.14-1.95) was found after birth at most expectant units compared with most active units, but among multiparas, no such associations were detected. A decreased rate of cesarean section was found for both primiparas (OR 0.83, 95% CI 0.80-0.86) and multiparas (OR 0.82, 95% CI 0.77-0.86) at units with expectant vs. active management. No association between perinatal death and delivery-unit specific management of prolonged pregnancies was detected. CONCLUSIONS: Offspring to primiparas might gain from a more active management of prolonged pregnancies, whereas no such improvement of neonatal outcome among multiparous women was detected.
Authors: Mårten Alkmark; Judit K J Keulen; Joep C Kortekaas; Christina Bergh; Jeroen van Dillen; Ruben G Duijnhoven; Henrik Hagberg; Ben Willem Mol; Mattias Molin; Joris A M van der Post; Sissel Saltvedt; Anna-Karin Wikström; Ulla-Britt Wennerholm; Esteriek de Miranda Journal: PLoS Med Date: 2020-12-08 Impact factor: 11.069