Risk factors for preterm delivery with placenta previa
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Shira G. Fishman
,
Stephen T. Chasen
Abstract
Aims: To identify factors associated with preterm delivery in cases of sonographically identified placenta previa.
Methods: Pregnancies with sonographic evidence of placenta previa at ≥28 weeks were identified. Demographic information, antepartum course, and delivery information were extracted from electronic medical records. Statistical analysis was performed with Fisher’s exact test, Mann-Whitney U, Spearman’s ρ (correlation), and logistic regression. Continuous data are presented as median (interquartile range).
Results: Of 113 singleton pregnancies with placenta previa, 54 (48%) delivered at term and 59 (52%) delivered preterm. Fifty-one (45%) experienced antepartum bleeding at a median gestational age of 31 weeks (29–33 weeks) with a median interval of 20 days (11–33 days) between first bleeding episode and delivery. Women with antepartum bleeding were more likely to be delivered for hemorrhage (36 of 51 vs. 8 of 62, P<0.001) and delivered emergently (40 of 51 vs. 14 of 62, P<0.001). Antepartum bleeding before 34 weeks had a positive predictive value of 88% for preterm birth and 83% for emergent delivery.
Conclusion: In pregnancies with placenta previa, antepartum bleeding is a strong predictor of preterm delivery.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Review article
- WAPM Working Group on Nutrition: Potential chronobiotic role of human milk in sleep regulation
- Opinion Paper
- “Every case of asphyxia can be used as a learning example”. Conclusions from an analysis of substandard obstetrical care
- Original Articles – Obstetrics
- Hematologic profile of the fetus with systemic inflammatory response syndrome
- Optimized amniotic fluid analysis in patients suspected of intrauterine infection/inflammation
- Risk factors for preterm delivery with placenta previa
- Recombinant human factor VIIa prevents hysterectomy in severe postpartum hemorrhage: single center study
- Combination antiretroviral therapy with protease inhibitors in HIV-infected pregnancy
- Vitamin D status during normal pregnancy and postpartum. A longitudinal study in 141 Danish women
- The impact of the time interval between two successive deliveries in an obstetric unit in terms of the mode of each delivery and the rate of perinatal mortality
- Original Articles – Fetus
- Terbutaline: effects on the fetal heart at term
- Parallel maternal and fetal immune activation by bacterial toxins in vitro
- Original Articles – Newborn
- Prepregnancy body mass index, socioeconomic status, race/ethnicity and breastfeeding practices
- Fetal and neonatal outcome in patients with anterior abdominal wall defects (gastroschisis and omphalocele)
- Total serum bilirubin level in umbilical cord blood and respiratory distress syndrome in very low birth weight infants
- Short Communication
- Improved overall delivery documentation following implementation of a standardized shoulder dystocia delivery form
- Letters to the Editor
- Prevention of prematurity – a complex undertaking
- Prevention of prematurity – a complex undertaking reply
- Congress calendar
- 10.1515/JPM-2011-1000
