Menstrual cycle The menstrual cycle is on average 28 days in length. It begins with menses (day 1-7) during the follicular phase (day 1-14) and followed by ovulation (day 14) and ending with the<unk>  (day 14-28). Unlike the follicular phase which can vary in length among individuals, the<unk>  is typically fixed at approximately 14 days (i.e. days 14-28) and is characterized by changes to hormone levels, such as an increase in progesterone and estrogen levels, decrease in gonadotropins like FSH and LH, changes to the endometrial lining to promote implantation of the egg, and development of the corpus<unk> eum. In the absence of fertilization by sperm, the corpus<unk> eum atrophies leading to a decrease in progesterone and estrogen, an increase in FSH and LH, and shedding of the endometrial lining (menses) to begin the menstrual cycle again.
Luteal phase
Follicular phase
Days post coitum
Postdrome
Premycotic phase
Postpartum period
Pod mod
Benefit period