Evolution of polycystic ovaries in a girl with delayed menarche. A case report.

A 17-year-old girl had delayed growth secondary to low birth weight. Although she entered puberty at 12.5 years, she had delayed menarche. She underwent serial ovarian ultrasound scans, and a change in ovarian morphology was observed, from a normal multicystic appearance to one typical of polycystic ovaries (PCOs). We hypothesize that normal ovarian morphology may change to PCOs during the peripubertal period because of a change in the endocrine milieu.