Can taking birth control pills while pregnant cause nausea? |

Birth control pills prevent pregnancy by stopping ovulation, or the release of an egg into the ovaries. Birth control pills contain hormones -- estrogen, progestin or both -- which prevent the egg from being released before menstruation. If no egg is released, a sperm cannot join with it. Hense, pregnancy is prevented. There are many different pills, so consult with your doctor to choose one that is right for you.

Birth control refers to the interception of a female egg and a male sperm so that embryo implantation, resulting in pregnancy, does not occur. Birth control has been practiced for thousands of years, and there are various methods which have evolved, including birth control pills, patches, and shots, as well as condoms, diaphragms, and birth control rings. Methods that don't require additional contraception include early withdrawal and abstinence.

Birth is an event in which a new being emerges from another being. Among animals, a birth can be from an egg or a ''live birth,'' as in the case of mammals. For human, birth has become less dangerous for mothers; but even with modern medicine, there are risks. A healthy birth is more likely if the mother is under a doctor's from the moment she knows she is pregnant.