On which of the following facts does the method of periodic abstinence is based ?
A. Ovulation occurs on about the 14th day of menstruation.
B. Ovum remains alive for about 1-2 days.
C. Sperms survive for about 3 days.
D. All of these
Answer:D
On which of the following facts does the method of periodic abstinence is based ?
A. Ovulation occurs on about the 14th day of menstruation. B. Ovum remains alive for about 1-2 days. C. Sperms survive for about 3 days. D. All of these