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. Natural estrogen level also helps in the prevention of osteoporosis. 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. 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. Moreover, if the level of hormone is also imbalanced the risks of the menopausal symptoms will increase. It is true that Estrogen is a natural body substance but it is coupled with side effects in the person s body. It can affect the growth of a person or the development of the reproductive system and the secondary reproductive systems. The minimum amount of estrogen can be an effect of the following condition: Fetal demise Anencephaly Maternal ingestion of corticosteroids Placental sulfatase deficiency Progesterone has the following functions: It is the hormone responsible for the preparation of endometrium for nidation. It maintains the normal function of the endometrium It relaxes the myometrium. Because it is stronger than Estriol it is more effective symptomatic alternative than the latter. Estrone on the other hand has the same function as the Estradiol, but it is considered to have a weaker effect. The pituitary gland and the hypothalamus is the one responsible for producing these types of hormones, and acts as the lutienizing agent in controlling its production in the body. For a guy, its one of those subjects that would least interest them to know. But for women, this is vital information that could be very vital for them. Estrogen For starters, oestrogen functions as the primary female sex hormone composed of a group of steroid compounds, named for their significance in the oestrus cycle.