The U.S. Food and Drug Administration approved Natazia, a combination hormonal tablet for use as an oral contraceptive. Natazia contains two female hormones, an estrogen (estradiol valerate) and a progestin (dienogest), and is the first four-phasic oral contraceptive marketed in the United States. Four-phasic refers to the doses of progestin and estrogen varying at four times throughout each 28-day treatment cycle. "Nearly 12 million women in the United States and more than 100 million women worldwide currently use oral contraceptives," said Scott Monroe, M.D... 
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