TY - GEN TI - New contraceptive vaccines, implants may prove promising SN - 0274-726X PY - 1996///0501 KW - Contraception KW - Contraception, Immunologic KW - Contraceptive Agents KW - Contraceptive Agents, Female KW - Family Planning Services KW - Levonorgestrel KW - Vaccines, Contraceptive N1 - Publication Type: Journal Article ER -