No wonder the rhythm method does not work so well for birth control — scientists in Canada said Tuesday they had found women sometimes ovulate several times a single month. Their findings, if verified ...

A growing number of teen girls in America say they use the rhythm method for birth control, and more teens also think it's OK for an unmarried female to have a baby, according to a government survey ...

The calendar-tracking method, or rhythm method, is one way people monitor and record their periods, but it might not be the most accurate. That's according to a new study released Monday by the ...

For women trying not to get pregnant, life should be easy. Conception can only happen 12-24 hours after ovulation. Sure, sperm may last as many as 3-4 days in the genital tract, hanging around for the ...