Take exit #154B to merge onto WA-518 W toward Burien/Sea-Tac/Airport. Take the Des Moines Memorial Dr exit, Turn right onto Des Moines Memorial Dr. Turn left onto S 140th St. ParkNJet-2 is on the right.
Androgens and estrogens are concerned in the development and maintenance of secondary sexual characteristics, such as breasts, external genitalia, body hair distribution and so on. Male pattern baldness is to some extent determined genetically, and may be countered in women by the presence of estrogens.
Estrogens are synthesized in all vertebrates as well as some insects. Their presence in both vertebrates and insects suggests that estrogenic sex hormones have an ancient evolutionary history. Quantitatively, estrogens circulate at lower levels than androgens in both men and women.