Major contraceptive methods: sterilization- either vas deferens or uterine tube is cut to inhibit fertilization-- possible side effects: pelvic pain, loss of ovarian function, bleeding. Oral contraceptives- make body believe you are pregnant to inhibit ovulation-- possible side effects: sore breasts, nausea, headaches, spotting, change in sexual desire level. Latex condoms- physically contains semen to keep sperm from reaching ovum-- possible side effects: could break; 14% chance of pregnancy. Hormone shot- makes body believe you are pregnant to inhibit ovulation-- possible side effects: weight gain; hormone alteration.