It serves as the precursor for the critical fetal hormones during pregnancy. It is also responsible for the stimulation of the aldosterone to produce more during pregnancy. These hormones are essential during pregnancy. Estrogen and progesterone are the main hormones that functions during pregnancy. So without it, women are not capable of bearing or producing a child. The users were even recommended to use a natural, bio-identical estrogen. 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. Most of the scientists believe that over production of estrogen can affect the normal function of the heart, which can cause some serious heart ailments. Normally, menstruation lasts from three to six days and follows a twenty-eight day cycle. However, if a women s menstruation lasts up to almost ten days and follows shorter menstrual cycle, it can be a sign of high estrogen level. Here are the different ways. Hormone replacement therapy these is a method used to supply the needed amount of estrogen in the body. It regulates the amount of estrogen to normal in the body so it will function effectively. Estrogen supplements - these are drugs that are taken orally to maintain the normal estrogen level in the body. People most particularly the women are aware about the fact that Estrogen patches can cause uterus or ovarian cancer. This is especially in the case of people who are recommended to undertake a long term Estrogen treatment. On the other hand, study shows that Estrogen patches reduce the risk of heart diseases but it is not strongly recommended for people to use it as an alternative for heart diseases because there is no sufficient proof supporting the study yet. Estrogen helps reduce hot flashes and lessen the threat for osteoporosis. Other researches show that estrogen also lessens the risk of cardiovascular diseases like heart disease. However, there are also researches, which presents that estrogen has no beneficial effects for heart problems. Others suggest that estrogen can protect a woman from having Alzheimer s disease, but this is not yet confirmed.