Commentary: intercourse: the hidden contraceptive?
Hatcher
R A
RA
D001519:Behavior; D003075:Coitus; D005193:Family Planning Services; D007246:Infertility; D000292:Pelvic Inflammatory Disease; D011271:Pregnancy, Ectopic; D012098:Reproduction; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases
Behavior; Coitus; Family Planning; Family Planning, Behavioral Methods; Infertility; Pelvic Infections; Pregnancy, Ectopic; Reproduction; Sex Behavior--side effects; Sexually Transmitted Diseases