PERIMON - Natural Family Planning 

Natural family planning program to determine up to twelve infertile days in the female cycle, next menstruation, the likely ovulation and forecast accuracy on a user friendly basis. For women from 18 to 45 years of age - freeware...
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Victoria Woman Calendar 

Calendar, secret diary, reminder,photo album and keeps track of women menstrual cycle. The Calendar predicts the future menstrual cycles and ovulation periods , and it make possible for you to plan vacation, travel, wedding and intercourse.
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