The major sex hormones can be classified as estrogens or androgens. Both classes of hormones are present in males and females alike, but in vastly different amounts. Most men produce 6-8 mg of testosterone (an androgen) per day, compared to most women who produce 0.5mg daily. Estrogens are also present in both sexes, but in larger amounts for women.

Estrogens are the sex hormones produced primarily by a female