The Identification of Gene Products in a Gene Library. Restriction enzymes (to cut the DNA) and gel electrophoresis (to separate the resulting fragments) can be used to produce a physical map of DNA segments in a process known as restriction mapping.
Estrogen pills may be prescribed to lessen the symptoms of menopause, like hot flashes. Estrogen is used in birth control pills to prevent conception. The thickness of the endometrium changes along with the female's menstrual cycle. Older women may have an estrogen deficiency as they begin menopause.
Women have been seduced by the promises of estrogen. As a young woman, estrogen in birth control pills kept you from getting pregnant. Estrogen also may have been used to keep your periods regular and acne clear. For gals over 40 this hormone is touted to keep bones firm, libido up and keep all of the nastiness of menopause at bay.