Fertility Signs
Most menstrual cycles have several days at the beginning that are infertile (pre-ovulatory infertility), a period of fertility, and then several days just before the next menstruation that are infertile (post-ovulatory infertility). The first day of red bleeding is considered day one of the menstrual cycle. Different systems of fertility awareness calculate the fertile period in slightly different ways, using primary fertility signs, cycle history, or both.
Read more about this topic: Fertility Awareness
Famous quotes containing the words fertility and/or signs:
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—Donald C. Medeiros (20th century)