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多胎妊娠的发生率一向以 Hellin 的1∶80~(n-1) (n=胎儿数)的公式估算,然而近年来由于应用促排卵药物而使多胎的发生率明显增加(克罗米芬为4％～8％、hMG-hCG 为20％～30％)。多胎对母、儿均为高危因素,故加强妊娠期管理甚为重要。1. 妊娠早期的管理于妊娠8～10周即可应用B 超测出胎儿数目,并可根据头臀长核对孕周是否正确。多胎妊娠先兆流产的发生率增高,特别是应用 hMG-hCG 后妊娠者,可高达21. 5％,其治疗与单胎相同。作者在三胎以上妊娠的病例中行宫颈缝合术,对延长妊娠时间有良好的疗效。
The incidence of multiple pregnancies has always been estimated by the formula of Hellin 1:80 to (n-1) (n = number of fetuses), however, the incidence of multiple births has been significantly increased in recent years due to the use of ovulation induction drugs (clomiphene citrate is 4% ~ 8%, hMG-hCG is 20% ~ 30%). Multiple births and infants, children are at risk factors, it is important to strengthen the management of pregnancy. 1. Early pregnancy management in pregnancy 8 to 10 weeks can be used to detect the number of B-fetus, and according to the hip-long nucleus of gestational age is correct. The incidence of multiple pregnancy threatened abortion increased, especially after the application of hMG-hCG after pregnancy, up to 21.5%, its treatment and singleton same. The authors performed cervical suture in more than one trimester of pregnancy with good efficacy in prolonging the pregnancy.