Landy H J, Weiner S, Corson S L, Batzer F R, Bolognese R J
Am J Obstet Gynecol. 1986 Jul;155(1):14-9. doi: 10.1016/0002-9378(86)90068-2.
Review of the sonographic findings of 1000 pregnancies with viable gestations in the first trimester revealed a minimum incidence of twinning of 3.29%. Of these, 21.2% demonstrated the "vanishing twin" phenomenon, often with associated bleeding, but with a good prognosis for the remaining fetus. Ovulation induction did not appear to alter these data. The sonographic criteria for "vanishing twin" are discussed. The incidence of multiple gestation is 3.29% to 5.39%, higher than previously believed.
对1000例孕早期有存活妊娠的超声检查结果进行回顾发现，双胎妊娠的最低发生率为3.29%。其中，21.2%表现出“消失双胎”现象，常伴有出血，但对剩余胎儿预后良好。促排卵似乎并未改变这些数据。文中讨论了“消失双胎”的超声诊断标准。多胎妊娠的发生率为3.29%至5.39%，高于此前认为的发生率。
