Abstract:
Hypofunction of the thyroid gland leads to changes in the menstrual cycle – most often man
ifesting as menorrhagia – and is accompanied by increased prolactin levels that adversely affect
the ovarian reserve, ultimately necessitating in vitro fertilization. An increase in gonadotropin
levels and a decrease in progesterone indicates more pronounced menstrual cycle disorders
and an increase in anovulatory cycles in patients, which dictates the need to correct hormonal
status for the effectiveness of IVF.