1 Introduction The uterus is an essential organ for human reproduction; its inner lining, the endometrium, is a highly dynamic tissue that undergoes cyclical phases of growth (the proliferative phase, Pro-phase), differentiation (the secretory phase, Sec-phase), degeneration (the menstrual phase), and regeneration in response to ovarian hormone changes.[1] Abnormalities during endometrial remodeling and regeneration can cause infertility, recurrent pregnancy loss, endometrial tumors,...