题目内容
受精卵着床必须具备的条件不包括
2021-10-12
A.透明带消失
B.受精卵发育至囊胚期
C.襄胚的滋养细胞层分化出合体滋养细胞
D.襄胚与子宫内膜同步发育
E.孕妇体内必须有足够数量的黄体酮
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