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PERIMON - Cycle calendar 3.6.9E
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fertility values or designate too many days as infertile by default, PERIMON`s fertility analysis is based upon the data of your individual cycle and includes a wide safety reserve for cycle irregularities Is birth control with PERIMON safe? You`d better ask "Is PERIMON safe enough for my needs", because contraception can always fail. PERIMON operates very cautious: If you use PERIMON only with the rhythm method, we estimate the Pearl index by comparision
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