Menstrual cycle (redirected from Premenstruation)

menstrual cycle

n.

The recurring cycle of physiological changes in the uterus, ovaries, and other sexual structures that occur from the beginning of one menstrual period through the beginning of the next.

---

Menstrual cycle

A hormonally regulated series of monthly events that occur during the reproductive years of the human female to ensure that the proper internal environment exists for fertilization, implantation, and development of a baby. Each month, a mature egg is released from the follicle of an ovary. If an egg is released, fertilized, and implanted, the lining of the uterus continues to build. If fertilization and/or implantation does not occur, the egg and all of the excess uterine lining are shed from the body during menstruation.

Mentioned in: Human Chorionic Gonadotropin Pregnancy Test

---

menstrual cycle,

n a recurring cycle of change in the endometrium during which the decidual layer of the endometrium is shed, then regrows, proliferates, is maintained for several days, and is shed again at menstruation. The average length of the cycle is 28 days.