Old age can be one of the reasons why women experience irregular estrogen production. Usually, when women reach old age, their body can no longer produce normal estrogen, which may lead to some bothering body malfunctions. Most of the women develop body irregularities due to inadequate production of estrogen. Without it, women will not have the different characteristics that identify them as women. Estrogen production is also essential to menstruation. They are the reason why women menstruate. This is because, estrogen is found in the eggs produced by the ovaries. Usually, the normal menstrual cycle in a woman s anatomy last for twenty eight to thirty days. With minimum amount of blood in the brain, women will have problems with recalling memory that sometimes leads to Alzheimer s disease. Low production of estrogen has relatively strong effects to the normal functioning of a woman s anatomy. Low estrogen production, causes irregularities in the menstrual period of some women. Usually, this is also the point when the woman does not have the capacity to bear a child anymore. However, in some cases there are still some of them who gives birth to the so-called menopausal babies. While a woman is entering the menopausal period the level of Estrogen is affected. This is a kind of hormone that plays a very important role in the female reproductive system. It lessen the threat of osteoporosis 2. It lessen the threat of cardiovascular diseases such as heart disease 3. It reduce hot flushes 4. It may reduce mood changes and enhance psychological comfort Although there are severe threats associated with estrogen therapy, many health practitioner and institutions believe that the helpful result set aside the risk factors. The Importance of Estrogen and Progesterone Women appear differently to men because of its primary sex characteristics brought by two female hormones called estrogen and progesterone. Women are pre dominated by these hormones that they appear to have smaller hips, bigger chest, slimmer body and firmer skin compared to men.