[CAS NO. 152-43-2]  Quinestrol

Animal experiments show that after oral administration, quinestrol is absorbed by the gastrointestinal tract and stored in the adipose tissue; then it is gradually released into the bloodstream at low levels to maintain a long-lasting effective concentration. Male gerbils exposed to quinestrol show a significant decrease in epididymides, seminal vesicles, semen quality, and reproductive rates. Quinestrol treatment causes an imbalance in the oxidation and antioxidant system in blood and testicular tissue. Quinestrol induces ROS and simultaneously reduces antioxidant enzyme activity, leaving germ cells in their oxidation state, which results in spermatogenic cell damage. .