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.
The two main types of over-the-counter estrogen products include creams and pills. Creams are either applied to the skin or inserted into the vagina, where the hormones will diffuse into the bloodstream. Pills are ingested and the hormones are absorbed into the bloodstream through the digestive system.