Demography & Family Welfare
In calendar method of contraception, first day of fertile period is? (AIIMS Nov 2010)
|A||Shortest menstrual cycle minus 10 days.|
|B||Shortest menstrual cycle minus 18 days.|
|C||10th day of longest menstrual cycle|
|D||18th day of longest menstrual cycle|
Calendar method/ safe period/ rhythm method
a. Calendar method/ safe period/ rhythm method is a miscellaneous method.
b. First described by Ogino in 1930.
c. It is based on fact that ovulation occurs from 12 to 16 days before the onset of menstruation.
d. The shortest cycle minus 18 days gives the first day of fertile period.
e. The longest cycle minus 10 days gives the last day of the fertile period.