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.
Romero
R
R
Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, CT 06510.
Hsu
Y C
YC
Athanassiadis
A P
AP
Hagay
Z
Z
Avila
C
C
Nores
J
J
Roberts
A
A
Mazor
M
M
Hobbins
J C
JC
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