Polycystic ovary syndrome is one of the most common pathologies in the practice of an obstetrician-gynecologist. Overcoming infertility characteristic of this syndrome is an important problem of endocrinology, gynecology, and reproductive medicine. Innovative therapeutic and surgical methods of treatment can correct hormonal and metabolic disorders, induce ovulation and achieve a long-awaited pregnancy. Early gestation periods in patients with polycystic ovary syndrome often occur with miscarriage, and the risks of developing gestational diabetes mellitus, cervical insufficiency, gestational arterial hypertension, preeclampsia, and placental insufficiency increase. We have analyzed modern ideas about the effect of various pathogenetic links of polycystic ovary syndrome on the course of pregnancy.