Girls of reproductive age regularly ovulate – once every 21-36 days. Periodicity is regulated by neurohumoral mechanisms, mainly gonadotropic hormones of the anterior pituitary gland and follicle-stimulating hormone.
A dominant follicle grows in the ovary, which ruptures mid-cycle and releases a mature egg. She is ready to merge with a sperm. The female reproductive cell moves into the fallopian tube, where it will wait to meet the male gamete. At this time, the concentration of progesterone increases. The hormone prepares the body for possible fertilization.
A woman cannot become pregnant without the ovulatory phase. If it was not there, the oocyte does not mature and does not merge with the sperm.
Throughout life, the rhythm of the process is constant. Abortion, childbirth and age over 40 disrupt its stability.