Studies show that normal estrogen supplement helps in preventing Alzheimer's disease. Alzheimer s disease is common to old age especially to women. Scientists have discovered that estrogen is one among the best hormones in the prevention of this disease. Hormone replacement therapy is also essential for women who are experiencing menopause. A woman is advised to take an estrogen replacement therapy to improve the level of estrogen that decline due to a disorder called hysterectomy after the menopausal period. It is given for women who undergo either the premenopausal and postmenopausal period in their menstrual cycle. This is usually done in order to avoid possible discomfort and health problem brought by the imbalance estrogen hormone in the system of a woman. Otherwise, a woman already knows about the health risk of the estrogen but is still not bothered about it. What they want is to get rid of the menopause symptoms immediately even if it will give her in return unbearable diseases. Do not know that there are also effective but safe ways to remove hot flashes and other menopause symptoms without the need to use the estrogen pills. If you maintain a safe level of estrogen in your body, it will help in the maintenance of proper blood flow; it also controls the cholesterol level and functions as an antioxidant of the body that filters harmful chemicals found in the body. With lower estrogen, the ovaries will produce minimum numbers of eggs as well. Does a woman who has been taking estrogen for quite some time, be subjected to the same daily-recommendations of intake for those who has just started the therapy? Although the Women s Health initiative did not take in hand this particular query, observational undertakings proved that taking estrogen for quite a while starting in menopausal stage prove to have some health benefits. Other possible negative effects of estrogen include: Vaginal bleeding or spotting Abdominal pains Poor sleeping habit Skin rashes Depression Head aches, migraine headaches Causes endometrial cancer Therefore, with both of these positive and negative effects presented, the decision in taking estrogen will not be all yes .