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  1. The calendar contraceptive method is a natural method of birth control.
  2. It is also called as Rhythm method.
  3. It is based on the abstinence from sexual intercourse during the period of ovulation including few days prior to and after ovulation, i.e. “The DANGER PERIOD”.
  4. The menstrual cycle is of 28 days.
  5. Ovulation takes place on the 14 day or 3-4 days prior or after.
  6. Ovum can remain active in the fallopian tube for 2 days.
  7. Sperms too can remain active for 2 days in the vaginal tract.
  8. The first four days of the menstrual cycle is the bleeding phase or menstrual phase.
  9. 5th day to 9th day (5 days) and 21st to 28th day (8 days) are considered to be “The SAFEPERIOD”.
  10. 10th day to 20th day are considered to the “The DANGER PERIOD”. During which conception is likely to take place.
  11. The calendar contraceptive method is not a reliable method since the time of ovulation is uncertain and is likely to change.
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