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Calculate Safe days of love making to avoid pregnancy

It is a Calendar-based contraceptive method. The Safe days Method is based on a formula taking into consideration the timing of ovulation, the life of the sperm and the egg, and the resulting likelihood of pregnancy on particular days of the menstrual cycle. The safe Days Method is promoted in conjunction with CycleBeads, a ring of colored beads which are meant to help the user keep track of her fertile and non-fertile days.


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