Which of the following is an incorrect statement for periodic abstinence?
A. The couple should abstain from coitus from day 10 to 17 of the menstrual cycle when ovulation could be expected
B. 10th to 17th day of the cycle is fertile period, when the chances of fertilisation are high
C. This prevents the chances of union of male and female gametes
D. In this method, the ovum and sperms are prevented from physically meeting with the help of barriers.
