On which of the following facts does the method of periodic abstinence is based ?

Options

A. Ovulation occurs on about the `14^(th)` day of menstruction
B. Ovum remains alive for about 1-2 days
C. Sperms survive for about 3 days
D. all of these

Answer

D

Explanation

Periodic abstinence is a method of contraception in which the couples avoid intercourse from day 10 to 17 of the menstrual cycle because ovulation can occur during this period. The chances of fertilisation are high during this period. Ovum remains alive for above 1-2 days and sperm survives for about 3 days.