Ovulation or release of ovum occurs on which day of the menstrual cycle?
A. 8 – 10
B. 12 -14
C. 14 -16
D. Last two days of menstrual cycle

Hint:-Menstrual cycle is the cycling changes in the reproductive tract of female primates, e.g. monkeys, apes and human beings. Menstruation is the period of shedding of the endometrium of the uterus with bleeding.

Complete step-by-step solution:-
- In a healthy woman, menstruation occurs at the intervals of about 28/29 days. Menarche is the
starting of menstruation in the girls at the puberty.
- Menstrual cycle consists of menstrual phase, proliferative phase or follicular phase and
secretory or luteal phase.
- Proliferative phase occurs from 5 th to 14 th day and consists of growth of endometrium of the
uterus, fallopian tube and vagina.
- In ovary, a Graafian follicle secretes estrogen during this phase and this hormone remains active
throughout this phase. The ovum is ejected from the follicle near the end of the proliferative
phase, i.e. 14 th day or midway during the cycle. The ovulation occurs under the influence of LH
from pituitary.
- The subsequent phase of 14 days in which the corpus luteum is referred to as the secretory
phase. Progesterone secreted by corpus luteum is active during this phase. The endometrium
and glands grow further during the secretory phase.
- At the end of the secretory phase, corpus luteum degenerates into the corpus albicans in the
ovary. Progesterone secretion falls and the overgrown endometrium breaks down and
menstruation takes place.
So, the correct answer is that ovulation occurs on 12-14 th day of menstrual cycle.

Note:- Menstrual cycle is controlled by FSH, LH, estrogen and progesterone. The menstruation and menstrual cycle remains suspended during pregnancy and lactation. Menopause is the period of life when menstruation stops.