Assertion : From day 10 to 17 of the mentrual cycle is called fertile period.
Reason : As chances of fertilisation are very high during this period.

Why is the period between day 10 and 17 of the menstrual cycle,callled fertile period?

A: Periodic abstinence is one such natural method of contraception in which the couples avoid or abstain from coitus from day 10 to 17 of the menstrual cycle, when ovulation could be expected. R: Day 10 to day 17 of menstrual cycle is considered as safe period.

A: Periodic abstinence is one such natural method of contraception in which the couples avoid or abstain from coitus from day 10 to 17 of the menstrual cycle, when ovulation could be expected. R: Day 10 to day 17 of menstrual cycle is considered as safe period.

Assertion : Fertilisation which takes place inside the female body is called internal fertilisation. Reason: Internal fertilisation is very common in aquatic animals such as starfish.

Assertion A: Couples should keep away from copulating during 10 to 17 days of menstruation. Reason R: There is highest chance of fertilization during 1 to 17 days of menstruation (A) A and R both are correct, R is correct explanation for A (B) A and R both are correct, R is not correct explanation of A (C) A is correct and R is incorrect (D) A is incorrect and R is correct