title: Risk factors for postpartum hemorrhage after vaginal delivery of twins.
abstract: We examined vaginal deliveries of twins to identify factors most strongly associated with the increased risk of postpartum hemorrhage (estimated blood loss > or = 1,000 mL). We reviewed the obstetric records of all 171 twin vaginal deliveries at Japanese Red Cross Katsushika Maternity Hospital from January 2002 through August 2006. Of these deliveries, 41 (24%) were complicated by postopartum hemorrhage. Postpartum hemorrhage was significantly more likely in cases with gestational age > or = 39 weeks (odds ratio [OR], 3.47; 95% confidence interval [CI], 1.65-7.28), a combined birth weight of more than 5,500 g (OR, 2.53; 95% CI, 1.00-6.45), induction of labor (OR, 2.87; 95% CI, 1.38-5.98), oxytocin administration during labor (OR, 2.86; 95% CI, 1.27-6.48), or a duration of labor > or = 24 hours (OR, 2.55; 95% CI, 1.15-5.62). Postpartum hemorrhage is a frequent complication in twin pregnancies. Therefore, special attention should be given after birth to patients with induction of labor or intervened delivery especially at > or = 39 weeks gestation.
authors: Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, Tokyo, Japan. czg83542@mopera.ne.jp
authors: Shunji
authors: S
authors: Suzuki
authors: Fumi
authors: F
authors: Kikuchi
authors: Nozomi
authors: N
authors: Ouchi
authors: Chiaki
authors: C
authors: Nagayama
authors: Michiko
authors: M
authors: Nakagawa
authors: Yusuke
authors: Y
authors: Inde
authors: Miwa
authors: M
authors: Igarashi
authors: Hidehiko
authors: H
authors: Miyake
mesh_terms: D000328:Adult; D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D010120:Oxytocics / Q000008:administration & dosage; D010121:Oxytocin / Q000008:administration & dosage; D006473:Postpartum Hemorrhage / Q000209:etiology*; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012307:Risk Factors; D014427:Twins
chemical_list: D010120:Oxytocics; D010121:Oxytocin