Читать книгу Zita West’s Guide to Getting Pregnant - Zita WEST, Zita West - Страница 33

The rising oestrogen level makes the hypothalamus reduce the secretion of GnRH and FSH. As the FSH decreases, oestrogen levels from the maturing follicle rise abruptly. Only then will the pituitary gland secrete LH (luteinizing hormone), which allows just one mature follicle to release an egg – ovulation.