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目的探讨双胎妊娠的胎儿发育规律及适宜分娩孕周。方法回顾性分析宜宾市翠屏区妇幼保健院1997年11月至2007年3月收治的166例双胎妊娠的胎儿超声测量结果、妊娠期限等。结果双胎妊娠自孕28周以后发育平均双顶径值较单胎小2.42 mm(t=6.43,P<0.01),平均股骨长较单胎小3.1 mm(t=8.710,P<0.01),平均出生体质量明显低于单胎同孕周平均值(t=7.25,P<0.01),平均分娩周数为(37.0±1.5)周。结论双胎妊娠与单胎妊娠的发育规律不同,其新生儿出生体质量明显低于单胎,平均分娩孕周较单胎明显缩短。
Objective To investigate the fetal development of twin pregnancy and gestational age suitable for delivery. Methods A retrospective analysis of maternal and child ultrasound results of 166 twin pregnancies, from November 1997 to March 2007, in Juping District Maternal and Child Health Hospital of Yibin City was conducted. Results The average biparietal diameter of twin pregnancies after birth was 2.42 mm (t = 6.43, P <0.01), and the mean femoral length was 3.1 mm (t = 8.710, P <0.01) The average birth weight was significantly lower than the average singleton gestational age (t = 7.25, P <0.01), the average number of weeks of delivery was (37.0 ± 1.5) weeks. Conclusion The development of twin pregnancies is different from that of singleton pregnancies. The birth weight of newborns is significantly lower than that of singletons, and the average gestational weeks of average births are significantly shorter than those of singletons.