Question

During a menstrual cycle, copulation on which of the following phases has the least probability of fertilizing an egg?

(a) Menstrual phase

(b) Onset of follicular phase

(c) End of the follicular phase

(d) End of the luteal phase

I have been asked this question during an internship interview.

Asked question is from Human Reproduction in chapter Human Reproduction of Biology – Class 12

Answer 1

Right option is (c) End of the follicular phase

Easiest explanation: Fertilization occurs only when the egg and sperm are present in the ampulla at the same time. Hence the coitus should happen near the period of ovulation. Ovulation occurs at the end of the follicular phase or the onset of luteal phase.