MEDICAL PHYSIOLOGY

Detailed explanation-1: -What is menstruation? Menstruation is one part of a woman’s cycle when the lining of the uterus (endometrium) is shed. This occurs throughout a woman’s reproductive life. With each monthly cycle, the endometrium prepares itself to nourish a fetus.

Detailed explanation-2: -Menstruation: The monthly shedding of blood and tissue from the uterus that happens when a woman is not pregnant.

Detailed explanation-3: -If the egg does not become fertilized, the lining of the uterus (endometrium) is shed during menstruation. The average menstrual cycle lasts 28 days. The cycle starts with the first day of one period and ends with the first day of the next period. The average woman ovulates on day 14.

Detailed explanation-4: -The lining of the uterus, or endometrium, prepares each month for the implantation of an embryo. This preparation occurs under the influence of estrogen and progesterone from the ovary. If no pregnancy develops, the endometrium is shed as a menstrual period, about fourteen days after ovulation.