Gynecology: Pills in White & Pink

To the half-dozen kinds of oral contraceptives already on the U.S. market, all of which work on essentially the same principle, yet another was added last week. This one, say the manufacturers, works differently.

As nature has worked things out, a woman secretes a moderate amount of estrogenic hormones during the first ten or twelve days of her menstrual cycle. At about the time she ovulates, releasing into her Fallopian tubes an egg ready for fertilization, her output of estrogens rises sharply. Had it been at this higher level all along, she never would have ovulated. Soon after ovulation, estrogen...

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