Even in the mother’s womb in the girl’s body a certain number of follicles is laid. Basically, women have their own reserve of egg cells, there are about 2 million of them. The number and quality of immature egg cells decreases in the ovaries with age. In adolescence, the hormones of the pituitary and ovaries begin to separate, hence ovulation and menstruation begin.

At the beginning of your cycle, the pituitary gland, located at the base of the brain, produces a follicle-stimulating hormone (FSH). It is the main hormone that stimulates the ovaries to produce eggs. Follicles are fluid-filled vesicles in the ovaries. Each follicle contains an unripened egg. FSH promotes the maturation of some follicles and the production of the hormone estrogen. Estrogen also promotes the formation of mucus, the environment is “friendly to sperm” (or scientifically cervical (cervical)). In particular, it also thickens the inner layer of the uterus. Each month, one follicle ripens. If fertilization occurs, a fertilized egg leaves the fallopian tubes.

The level of LH (luteinizing hormone) rises more than once (wave LH), allowing to release the ovum from the ovary. This usually occurs on the 13-17th day of menstruation. A special substance of yellow color is lutein containing progesterone. Formed on the site of the bursting follicle, the body therefore acquires a yellow color, hence its name - the “yellow body”. The hormone secreted by it - progesterone plays a huge role in the physiology of a woman. This hormone allows the formation of appropriate receptors for feeding a fertilized egg on the inner wall of the uterus.