Be in eachMenstruationIn cycle, as the periodic change of ovarian endocrine hormone, mammary gland organizes the change of the hyperplasia that also producing go round and round and instauration.

• 在每一个月经周期中，随着卵巢内分泌激素的周期性变化，乳腺组织也发生着周而复始的增生与复旧的变化。