[Effects of continuous exposure to light on the ovaries of puberal rats]

Female Albino Rats exposed to permanent light, have polycystic and anovulatory ovaries, with a vaginal cytology composed of cornified cells (persistent estrus) and a plasmatic hyperandrogenia. These structural modifications are similar to those of women affected by Stein-Leventhal's syndrome. The possible role of regulation of the pineal gland is considered.