Question

Which of the following does not occur between 15-28 days of menstrual cycle?

• A. Secretory phase
• B. Premenstrual phase
• C. Proliferative phase
• D. Luteal phase

Answer 1

The correct option is C Proliferative phase

Menstrual cycle
The cyclic changes that occur in the ovaries and the lining of the uterus in the female reproductive system of primates are called the menstrual cycle. Examples include humans, monkeys, etc.

Phases of the menstrual cycle
The menstrual cycle consists of three phases as follows: 1)Menstrual /bleeding phase
2)Follicular or proliferative phase
3)Luteal or secretory phase

Menstrual/bleeding phase
1)Menstrual or bleeding phase lasts for about 3 - 5 days. Degeneration of the corpus luteum results in a decreasing level of progesterone.
2)There is shedding of the endometrium resulting in the discharge of blood, cells, etc., from the vagina.

Follicular or proliferative phase
The follicular or proliferative phase lasts for about 7 - 8 days.
1)In this phase the follicular cells mature and give rise to the Graffian follicle.
2)Endometrium becomes thicker by rapid cell multiplication, an increase of uterine glands, and blood vessels.
3)Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge.
4)It induces rupture of the Graffian follicle and thereby the release of the ovum (ovulation). This usually happens on the 14th day.
5)This phase approximately happens during the 6th to 14thday of the cycle.

Luteal or secretory phase
The luteal or secretory phase lasts for about 13 -14 days.
1)The ruptured Graafian follicle changes to the corpus luteum which releases progesterone.
2)It stimulates the uterine glands to produce an increasing amount of watery mucus.
3)This happens from the 15th to the 28th day. This phase is also called the premenstrual phase.

Final answer
(D) Proliferative phase