Cho Fu-Nan, Kan Yuen-Yee, Chen San-Nung, Yang Tsung-Lung, Hsu Pei-Hua
Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, ROC.
J Chin Med Assoc. 2005 Nov;68(11):535-7. doi: 10.1016/S1726-4901(09)70089-9.
Pregnancies with a very large yolk sac are generally always associated with poor outcomes. Herein, we present a case in which a very large yolk sac (mean diameter, 8.1 mm) and a bicornuate uterus were shown on transvaginal sonography in the first trimester, but which resulted in a live birth. To our knowledge, this is the largest yolk sac among all cases accompanying live births which have been published in the literature. The unusual enlargement of the yolk sac may be secondary to the compensation effect for the poor blood supply in the medial wall of the bicornuate uterus for the conceptus. To predict the outcome of pregnancy, based on this case report, the quality of the yolk sac might be more important than its size.
卵黄囊非常大的妊娠通常总是与不良结局相关。在此，我们报告一例，在孕早期经阴道超声检查显示卵黄囊非常大（平均直径8.1mm）且为双角子宫，但最终活产。据我们所知，这是文献中已发表的所有活产病例中最大的卵黄囊。卵黄囊异常增大可能是双角子宫内侧壁对胚胎血液供应不足的一种代偿效应。基于本病例报告，为预测妊娠结局，卵黄囊的质量可能比其大小更重要。
