Preterm delivery: a risk factor for retained placenta.
The purpose of this study was to determine whether preterm delivery, with and without intraamniotic infection, is a risk factor for retained placenta. This complication occurred more frequently in women with preterm vaginal delivery than in women with term vaginal delivery (9.1% [21/231] vs 1.1% [6/561]; p less than 0.00001; odds ratio = 9.25). There was no significant difference in the prevalence of retained placenta between women with preterm labor and intact membranes and those with preterm premature rupture of membranes (8% [10/125] vs 10.4% [11/106]; p greater than or equal to 0.05). A positive amniotic fluid culture or clinical chorioamnionitis was not associated with a higher incidence of retained placenta. This study indicates that preterm delivery is associated with an increased risk of complications of the third stage of labor.
Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, CT 06510.
R
R
Romero
Y C
YC
Hsu
A P
AP
Athanassiadis
Z
Z
Hagay
C
C
Avila
J
J
Nores
A
A
Roberts
M
M
Mazor
J C
JC
Hobbins
D000328:Adult; D002821:Chorioamnionitis / Q000150:complications; D005260:Female; D005322:Premature Rupture of Fetal Membranes / Q000150:complications; D006801:Humans; D007749:Labor Stage, Third; D007744:Obstetric Labor Complications / Q000209:etiology*; D007752:Obstetric Labor, Premature / Q000150:complications*; D010922:Placenta Diseases / Q000209:etiology*; D011247:Pregnancy; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors