Contraception – deliberate prevention of pregnancy, "birth control"
Dilatation & Curettage (D&C) – a surgical procedure to scrape out the lining of the uterus. If done while a woman is pregnant, it is also a form of abortion.
In Vitro Fertilization (IVF) – union of an egg and sperm outside of the body. Babies produced in this manner are sometimes called "test tube babies."
Lubricant – a substance that coats an item to reduce friction; vaginal lubricants are sometimes used to avoid discomfort during halachic or medical examinations or marital relations.
Spermicide – chemical substances that damage sperm. They can be used during marital relations to prevent pregnancy.