As researches give more information about estrogen, it may help pinpoint the reasons should those persons take it or not. To most women, the helpful effects of estrogen are far more important than the harmful effects it can give. Estrogen helps reduce hot flashes and lessen the threat for osteoporosis. It may be existent in both men and women, but they are usually present at extensively higher levels in women of reproductive age. At such period, oestrogen support the development of secondary female sex features, such as breasts, and are also involved in the thickening of the endometrium and other aspects of regulating the menstrual series. A large number of women stopped taking estrogen pills after they have heard the initial report of the National Institute of Health that showed the serious danger of the estrogen pills. However, there are still some women, which are continuously using the pill. Why is it? Most women still use estrogen pills perhaps: Have not heard anything about the life-threatening danger it could give. And one of these hormones is the estrogen which is a vital for every woman in this world. Estrogen is one of the most important hormones in a women's body. It provides some identifying features of a woman such as bigger chest, smaller hips, and a firmer skin. It helps in the reproduction as well. Estrogen is produced primarily by the ovaries where the egg cells are produced. The most common side effects with estrogen hormone are: Softness of the breast, either men or women Inflammation of the ankles and legs Lesser cravings for food Sudden changes in weight Nausea Vomiting Abdominal pains Skin Irritation Other side effects are: Bleeding gums Vaginal bleeding and spotting Changes in menstrual flow Painful menstruation PMS or the pre-menstrual syndrome Vaginal infection such as Candida Diarrhea Loss of scalp hair Migraine Faintness Despair Increased sexual desires Decreased sexual desires Rare side effects include: Blood clotting Sudden feeling to urinate Unclear speech Changes in vision Breathlessness Estrogen hormone should always be balanced. Many studies and researches were conducted towards finding out the very nature of estrogen. All of these undertakings agreed on one thing, estrogen is a primary component in the indication of the human body clock. It was found that it directly relates in the body cycle of a human being. Estrogen, as defined in the modern medical dictionary- does not only pertain to a single compound but is rather made up of groups of steroid compounds.