初级卵母细胞完成第一次减数分裂完成于
A. 初级卵泡
B. 次级卵泡
C. 排卵前36-48小时
D. 排卵时
Which stage of the follicle is marked by the surrounding of flattened (squamous) follicular cells becoming cuboidal?
A. Primordial follicle
B. Primary follicle
C. Secondary follicle
D. Mature follicle
粒黄体细胞主要分泌
A. 孕激素
B. 雌激素
C. 黄体生成素
D. 雄激素
Secondary follicle完成第二次减数分裂的时间是
A. 排卵时
B. 受精时
C. 排卵前36-48小时
D. 排卵后36-48小时