As the name suggests, ERT replaces hormones which the ovaries no longer produce, either through natural or surgical menopause, and provides relief from the horrible symptoms of menopause such as hot flashes and night sweats. Types There are certain substances that are used in the ERT: such as conjugated estrogens or conjugated equine estrogens under the brand name of Premarin; patch; estrogens made of singular estrogen compounds; drugs such as raloxifene and alendronate; herbal remedies such as Black Cohosh, known to help reduce menopausal symptoms; and other hormones involved such as progesterone or progestins,. If Premarin is not suited in a person s system, it will result to the following side effects: A person experiences bloating and swelling in some areas of the body that may seem very unusual. There is also an intense feeling of irritation even without any reason. It leads to persistent high tempered feeling. 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. Estrogen as a Contributor in Signalling our Body Clock As medical technology advances throughout the years, there has been much fuss in the medical field about estrogen. Many studies and researches were conducted towards finding out the very nature of estrogen. All of these undertakings agreed on one thing, estrogen is a primary component in the indication of the human body clock. Because of this, many women are recommended to take estrogen to reduce menopause symptoms. While many women are benefited by estrogen during or after menopause, some are found at greater risk for particular diseases if they take it. As researches give more information about estrogen, it may help pinpoint the reasons should those persons take it or not. 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. During this period, estrogen is found in a normal state.