Milne B
Br J Radiol. 1980 Feb;53(626):85-6. doi: 10.1259/0007-1285-53-626-85.
Ultrasound would seem to be an ideal method of ensuring the early diagnosis of multiple pregnancy and also affords an opportunity to measure individual fetal growth thereafter. In a programme to study multiple pregnancies the majority were diagnosed early to allow adequate regular monitoring by ultrasound. Unexpected problems were encountered however and the failure rate to obtain satisfactory fetal biparietal measurements was almost three times that in singleton pregnancies.
超声似乎是确保多胎妊娠早期诊断的理想方法，并且此后还能提供测量各个胎儿生长情况的机会。在一项研究多胎妊娠的计划中，大多数病例都得到了早期诊断，以便通过超声进行充分的定期监测。然而，遇到了一些意想不到的问题，获得满意的胎儿双顶径测量值的失败率几乎是单胎妊娠的三倍。
