typical failure rate abstain fetus (101 more) sperm penis Family planning Hormones umbilical cord adolescence cervix epididymis pelvic inflammatory disease (PID) condom seminal vesicles circumcision artificial insemination infertile pro-life scrotum sterilization CK.SCI.ENG.SE.1.Human-Biology-Reproduction.11 sex organs maternal mortality rate placenta erection sexual intercourse progesterone pro-choice withdrawal corpus luteum pubic hair endometrium orgasm “morning after” pill sterile ideal failure rate semen oral contraception cycle of dependency IUD viability Spermicides sexually transmitted diseases (STDs) ovulation fertilization prenatal care side-effects major lips (labia majora) surrogate mother miscarriage amniotic fluid environmental degradation testosterone fertility rate or intrauterine device embryo contractions fertile labor Fallopian tubes contraception Norplant vagina in vitro fertilization puberty foreskin clitoris Abstinence bladder prostate gland trimester endocrine glands genitals vas deferens glossary abortion premature sexuality reproduction chemical barrier estrogen glans diaphragm malformed follicle birth control urethra testes hymen minor lips (labia minora) barrier methods cervical cap overpopulation sexually active urethral opening menstrual period birth control pill ovary infanticide adopt peer group uterus zero population growth egg

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