Word: progestins
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Dates: during 1970-1979
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...daily combination pills containing synthetic equivalents of the hormones progesterone and estrogen, with the latter in a microscopic dose; 2) sequential pills, which provide tablets of an estrogen alone for 14 to 16 days, followed by five to seven combination tablets. A third variety, the "one-everyday" pill of progestin (progesterone equivalent) only, is being tested but is not yet licensed for U.S. prescription...