How to use the accurate calculator for female ovulation? Women\’s ovulation period is one of the most important knowledge points in pregnancy preparation and contraception. Accurately grasping the ovulation period can help women control their fertility. With the advancement of technology, there are now many accurate ovulation calculators that can help women predict their ovulation and reduce errors. The following will introduce in detail the use of the accurate calculator for women\’s ovulation period from four aspects. Step 1: Record the menstrual cycle. Women’s menstrual cycle usually lasts about 28 days, but everyone’s cycle is different.