However, if you really want to take an estrogen therapy, it would be a nice idea if you discuss the matter carefully with your doctor. Keep in mind that it is your health that will be at stake so, you have to think about it a hundred of times. Great details and information can be found in the Internet. Due to the great effect that has been brought by estrogen replacement therapy in curing other types of illnesses, this paves the way for the American women to support the use of estrogen replacement therapy to cure the disorder in their estrogen hormones. At present, the therapy is patronized not only in America but in many parts of the world. 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. Sources of oestrogen include the ovaries, the corpus luteum, and the placenta. Smaller amounts of it are found in the liver, adrenal glands, and breasts. Aside from this, other factors are taken into consideration in planning the estrogen therapy for each individual case. Part of the related study undertaken by the group regarding too much estrogen intake, showed various negative effects on the body which will manifest in the duration of short term and long term intake. 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. While it is present in both male and female, it has higher concentrations in female, because it is the one responsible for the promoting of female secondary characteristics. Since these estrogen hormones can be taken, they have the same effects and side effects especially if the doses are the same. The hormones should not be used when a woman is pregnant because it can lead to miscarriage. If taken at the earlier stage of pregnancy, it can badly harm the developing fetus.