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目前因氯菧酚胺等卵巢刺激药物的应用,多胎发生率有明显增加倾向.多胎有较多的并发症,故属高危妊娠.超声诊断无损无痛,对多胎妊娠可用来早期诊断,判断双胎的类型、评定胎儿生长发育及胎儿间生长是否协调、检查胚胎或胎儿有元受损流失或畸形、引导羊膜腔穿刺进行遗传学研究等.在瑞士曾有人常规早期应用超声筛选多胎,一旦诊断成立,在孕29～36周时住院治疗.这样,双胎早期发现率由60%提高到95%,发现时胎龄也由原33孕周提前至19孕周.孕妇早产率下降为20%,与单胎相仿.可见多胎妊娠时早期诊治及超声显像法应用的重要性.
At present, due to the use of clopidol and other ovarian stimulation drugs, the incidence of multiple births have a clear tendency to increase .There are more complications of multiple births, it is a high-risk pregnancy .Ultrasonic diagnosis of non-painless, multiple pregnancy can be used for early diagnosis, Fetal type, assessment of fetal growth and fetal growth is coordinated, check the embryo or fetus yuan loss or deformity, guide the amniocentesis for genetic studies, etc .. In Switzerland, it was routinely early ultrasound screening of multiple births, once diagnosed Established in 29 to 36 weeks of pregnancy hospitalization.Thus, the early detection rate of twins increased from 60% to 95%, also found that the gestational age from the early 33 weeks to 19 gestational weeks early pregnancy rate decreased to 20% , Similar to the singleton, showing the importance of early diagnosis and treatment of multiple pregnancies and the application of ultrasound imaging.