AN INTRAUTERINE SILKWORM-GUT RING FOR CONTRACEPTION.
D000028:Abortion, Induced; D000818:Animals; D012831:Bombyx; D003267:Contraception; D003273:Contraceptive Devices; D005193:Family Planning Services; D005260:Female; D006801:Humans; D007246:Infertility; D007247:Infertility, Female; D010336:Pathology; D011247:Pregnancy; D013223:Statistics as Topic; D014599:Uterus
ABORTION; CONTRACEPTIVE DEVICES; FAMILY PLANNING; PATHOLOGY; PREGNANCY; STATISTICS; STERILITY, FEMALE; UTERUS