The<unk>  is a menstrual<unk>  by varying degrees of menstrual intervals and the absence of ovulation and a luteal phase. In the absence of ovulation, there will be infertility.
Anovulatory cycle
Anovulation
Antiestrogen withdrawal response
Premenstrual water retention
Obstetric transition
Progestin-induced virilization
Lactational amenorrhea
Menstrual cycle