Mantoni M, Pedersen J F
Acta Obstet Gynecol Scand. 1980;59(6):551-3. doi: 10.3109/00016348009155449.
A case of monoamniotic twins was diagnosed by ultrasonic scanning in the first trimester through the presence of two fetuses in one gestation sac. The fetuses died in utero in weeks 17 and 25. The possible ultrasound appearance of the various types of monozygotic and of dizygotic twins in early pregnancy is discussed and a scheme is suggested which allows some differentiation.
孕早期通过超声扫描发现一个妊娠囊内有两个胎儿,诊断为单羊膜囊双胎妊娠。胎儿分别于孕17周和25周死于宫内。本文讨论了早孕期各种类型单卵双胎和双卵双胎可能的超声表现,并提出了一种有助于进行某些鉴别的方案。