Читать книгу Need to Know Fertility, Conception and Pregnancy - Harriet Sharkey - Страница 7

Regular menstrual bleeding is controlled by a complex system. The brain controls the release of ‘signalling’ hormones called gonadotrophins from the pituitary gland at the base of the brain. There are two gonadotrophins: follicle-stimulating hormone (FSH) and luteinising hormone (LH).