Hormonal contraceptives contain various combinations of synthetic analogues of female sex hormones - estrogens and progestins.With proper use of COCs are the most reliable method of contraception.This pill does not protect against sexually transmitted diseases.

How do oral contraceptives

about the 14th day of the menstrual cycle (if cycle length of 28 days), a woman from the ovary into the abdominal cavity leaves mature egg from which it later falls into the fallopian tube.This physiological process is called ovulation.If the egg is fertilized by sperm, the pregnancy occurs.Birth control pills prevent the maturation and release of an egg from the ovary.Also hormonal contraceptives thickened mucus in the cervix box.This hampers the movement of sperm.COC also contribute to thinning lining of the uterus - the endometrium.There
fore, even if the maturation of the egg and its successful fertilization, it is much more difficult to gain a foothold in the uterus.

Pros contraceptive pills

The most important advantage of hormonal pills is the high contraceptive effect.In addition, the COC make monthly shorter and sparse, reduce their pain and reduce symptoms of premenstrual syndrome.Menstruation becomes a regular and predictable, which is important for women with cycle disorders.

medical studies have shown that oral contraceptives reduce the risk of cancer of the endometrium and ovaries, slows the growth of fibroids, endometriosis, and prevents the development of osteoporosis is prevention.Some birth control pills also have anti-androgenic effect - reduce the oiliness of the skin and prevent excessive growth of body hair.

Cons hormonal contraceptives

Disadvantages COCs are to the side effects that they can have on the body.To those effects include spotting, slight weight gain, bloating and breast tenderness, nausea, and loss of libido.These side effects do not occur in all women.But even if some of these unpleasant feelings appear, then 2-3 months after administration of the drug is usually everything goes.If after 2-3 months of COC side effects do not disappear, most likely picked up the wrong medication.In this case, you should seek medical advice to replace the contraceptive pill.

Rarely may develop more severe side effects, including hypertension, heart attack, stroke, deep vein thrombosis, jaundice, severe migraine attacks.In addition, some medical studies have shown that taking birth control pills increases the risk of breast cancer, and can aggravate existing for depression.