It has long been known that breast feeding can delay the return of fertility, but until recently the conditions under which women could rely on this phenomenon were unclear. In August 1988 an international group of scientists gathered in Bellagio, Italy, to review the scientific evidence related to the effect of breast feeding on fertility. In what came to be known as the "Bellagio consensus," they concluded that women who were fully or nearly fully breast feeding and amenorrhoeic had a less than 2% risk of pregnancy in the six months after delivery.
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