Safe Period Calculator

You should know the duration of the cycle, i.e. first day of the last menstrual bleeding to the first day of the present menstrual bleeding. This duration varies from person to person. Ovulation approximately occurs in the middle of the cycle. A week before and a week after the approximate day of ovulation is considered to be Fertile period. The days apart from this is called the safe periods, where the fertilization does not takes place.

Last menstrual period Y M D


  Safe period
  Ovulatory period
  Menstrual period

Pls set your menstrual cycle before calculate.
Menstrual Cycle Shortest   days
Longest   days

Note: You may consider the above suggestion at your own risk. Old version

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