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.
In the United States alone, 13 million women use hormonal contraception to protect their health and prevent unwanted pregnancy. 9 Birth control pills are one of the best-studied medications available, with over 50 years of data backing up their safety and effectiveness.8 Furthermore, women using birth control are not the only ones flushing estrogen down the drain. Pregnant women excrete high levels of natural estrogens, and nearly everyone (both women and men) produce some amount of natural estrogens also released into wastewater.