Question

The menstrual cycle in normal adult woman is of
(a) 48 days (b) 38 days
(c) 18 days (d) 28 days

Answer 1

The menstrual cycle in normal adult woman is of 28 days.

* The menstrual cycle is a hormone-driven phenomenon.

* The four main phases are:

1. Menstruation

2. Follicular phase

3. Ovulation

4. Luteal phase

* It starts from day 1 with bleeding( menstruation), and the 14th day is the one on which a woman ovulates( ovulation).

* The period starting from day 1 up to ovulation is the follicular phase.

* If the egg is not fertilized, the hormone levels drop.

Around day 25, the egg starts degenerating( luteal phase) and the entire cycle begins again.

Answer 2

Dear Student,

● Answer - (d)

The menstrual cycle in normal adult woman is of *28 days*.

◆ Menstrual cycle -

- Menstrual cycle is monthly cycle of changes in the ovaries and the endometrium which makes pregnancy possible.

- There are 4 phases of menstrual cycle -

(1) Follicular phase -

- duration - day 6 to day 13

- follicles release estrogen causing thickening of endometrium.

(2) Ovulatory phase -

- occurs at - day 14

- follicle ruptures and develop into corpus luteum.

(3) Luteal phase -

- duration - day 15 to day 28

- Endometrium is thickened due to release of estrogen & progesterone from corlus luteum.

(4) Menstrual phase -

- duration - day 1 to day 5

- Corpus luteum degenerates and endometrium is sloughed off causing per vaginal bleeding & mucous discharge.

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