Singh P M, Rodrigues C, Gupta A N
Acta Obstet Gynecol Scand. 1981;60(4):367-8. doi: 10.3109/00016348109154125.
In a retrospective analysis over the six year period, January, 1973 to December, 1978, the incidence of placenta previa in cases with previous cesarean section (C.S.) was found to be 3.9 per cent as compared to an overall incidence of 1.9 per cent (p less than 0.01). The risk of placenta previa was greater in the pregnancy immediately following the cesarean section. The incidence of a morbidy adherent placenta was also significantly higher in these cases.
在对1973年1月至1978年12月这六年期间的回顾性分析中,发现既往有剖宫产史的病例中前置胎盘的发生率为3.9%,而总体发生率为1.9%(p<0.01)。剖宫产术后立即妊娠时前置胎盘的风险更高。这些病例中胎盘植入的发生率也显著更高。