Check J H, Chase J S, Nowroozi K, Goldsmith G, Dietterich C
University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Camden.
Int J Fertil. 1992 May-Jun;37(3):165-6.
We describe a woman who conceived by in vitro fertilization (IVF) and embryo transfer (ET). Transvaginal ultrasound demonstrated at least 1 week's difference in size of twin gestations from 1 month post-transfer of embryos to delivery. Differences in sac size, crown-rump length, and gestational growth are discussed, as are implications of ultrasound in early pregnancy.
我们描述了一名通过体外受精（IVF）和胚胎移植（ET）受孕的女性。经阴道超声显示，从胚胎移植后1个月到分娩，双胎妊娠的大小差异至少有1周。文中讨论了孕囊大小、头臀长度和妊娠生长的差异，以及超声在早孕中的意义。
