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Ovulation Calendar is an effective software aid for any woman who either desires a pregnancy or wishes to prevent one. It can help you specify the gender of your baby and her zodiac sign. Designed by a woman in consultation with women physicians, Ovulation Calendar is a program that calculates the time of ovulation and generates your personal fertility calendar. Simply enter the length of your menstrual cycle and the date of your last period, and Ovulation Calendar will calculate your fertile days.