Weekes A R, Menzies D N, West C R
Br Med J. 1977 Jul 2;2(6078):16-8. doi: 10.1136/bmj.2.6078.16.
Factors associated with spontaneous premature birth were investigated in 459 consecutive twin deliveries at this hospital. Low maternal age, low parity, and zygosity were significantly related to the incidence of this complication. The number of previous abortions, sex combinations and related birth order, and mode of presentation of the first twin were not related to the incidence of spontaneous premature delivery. We conclude that apart from low maternal age and low parity there are no obvious factors that would permit early identification of twin pregnancies at risk from spontaneous premature birth.
在这家医院对459例连续双胎分娩中与自发性早产相关的因素进行了调查。低孕龄、低产次和双胎类型与该并发症的发生率显著相关。既往流产次数、性别组合及相关产次，以及第一胎的先露方式与自发性早产的发生率无关。我们得出结论，除了低孕龄和低产次外，没有明显因素能够早期识别有自发性早产风险的双胎妊娠。
