卵黄区 vitelline area 鸟类胚盘层的暗区中中胚层进入血管区的外周部暂时仍然只有外胚层内胚层覆盖着卵黄表面此部分称为卵黄区
卵巢管属无滋式，主要由原卵区和卵黄区组成。
The panoistic ovariole mainly consists of germarium and vitellarium.
结果TVS及TAS TVS对附件区包块、卵黄囊、胎芽、胎心搏动、宫内假孕囊、卵巢的检出率远较TAS高，差异均有统计学意义（P<0.01）。
Results The detection rate of mass, yolk sac, embryonic bud, embryonic heartbeat and ovary was higher in the TVS or TAS TVS test than those in the TAS test (P<0.01).
应用推荐