Strong T H, Brar H S
Department of Obstetrics and Gynecology, University of Southern California School of Medicine and Women's Hospital, Los Angeles 90033.
J Reprod Med. 1989 Jun;34(6):415-6.
The incidence of placenta previa in twin gestations was compared to that found in singleton pregnancies over a ten-year period. During this period, eight placenta previas occurred in 1,464 twin pregnancies, for an incidence of 0.55%, which was significantly higher (P less than .05) than the incidence of 0.31% in singleton pregnancies (458 placenta previas in 148,197 singleton pregnancies). We conclude that a twin gestation confers an added risk of placenta previa.
在十年期间，对双胎妊娠中前置胎盘的发生率与单胎妊娠中的发生率进行了比较。在此期间，1464例双胎妊娠中有8例发生前置胎盘，发生率为0.55%，这显著高于单胎妊娠0.31%的发生率（148197例单胎妊娠中有458例前置胎盘）。我们得出结论，双胎妊娠会增加前置胎盘的风险。
