In a study conducted by the National Center for Health Statistics in 2008, 0.5% or 309,000 Catholic women reported that they use the rhythm method.[5] Early in the twentieth century, the rhythm method was promoted by the Catholic Church as the only morally acceptable form of family planning. In the 1920s, it was discovered that for a woman with regular cycles, ovulation usually occurs the 14th day from the first day of her menstrual period. Based on this knowledge, a couple can calculate the best times to have intercourse in order to achieve or avoid pregnancy. The rhythm method is based on three assumptions: that ovulation occurs 14 days before the beginning of menstruation, plus or minus 2 days, that sperm survives up to 3 days outside the body, and that the ovum survives for 24
In a study conducted by the National Center for Health Statistics in 2008, 0.5% or 309,000 Catholic women reported that they use the rhythm method.[5] Early in the twentieth century, the rhythm method was promoted by the Catholic Church as the only morally acceptable form of family planning. In the 1920s, it was discovered that for a woman with regular cycles, ovulation usually occurs the 14th day from the first day of her menstrual period. Based on this knowledge, a couple can calculate the best times to have intercourse in order to achieve or avoid pregnancy. The rhythm method is based on three assumptions: that ovulation occurs 14 days before the beginning of menstruation, plus or minus 2 days, that sperm survives up to 3 days outside the body, and that the ovum survives for 24