卵黄囊预测妊娠结局的超声研究进展

Research development of yolk sac predicts pregnancy outcome

卵黄囊是妊娠囊内超声能见的第一个解剖结构。为了弄清卵黄囊的超声特点并评价卵黄囊与妊娠结局的关系,本文就国内外文献对卵黄囊与妊娠结局的关系作一综述。

The secondary yolk sac（YS） is the first extraembryonic structure that can be detected with uhrasonography in the chorionic cavity. In order to understand the feature of YS and evaluate YS and prediction of pregnancy outcome, This article is to review the recent study of YS and prediction of pregnancy outcome.