Question

Luteal phase is the other name of
A. Follicular phase
B. Proliferative phase
C. Menstrual flow phase
D. Secretory phase

Answer 1

Hint: Menstruation occurs commonly in humans, apes, and old-world war monkeys. This is bleeding from the uterus of a female at one lunar month. The first menstruation begins at puberty between 12 and 15 years of age and is known as menarche. One ovum is released (ovulation) during the middle of each menstrual cycle. This is regulated by certain hormones that are secreted by the pituitary glands. The hormone secreted by the pituitary gland influenced ovaries and the hormone produced by the ovaries affects the walls of the uterus.

Complete Answer:
- The menstrual cycle comprises four phases: the menstrual phase, proliferative phase, ovulatory phase, and secretory phase. The menstrual phase takes place on 2-3 days of the cycle.
- The secretion of LH hormone from the anterior lobe of the pituitary gland is reduced considerably. The endometrium layer of the uterus breaks down and menstruation begins.
- In the follicular or proliferative phase, the production of FSH (follicle-stimulating hormone) produced by the anterior lobe of the pituitary gland stimulates the ovarian follicles to secrete oestrogen which helps in the formation of the endometrium of the uterine wall.
- In the ovulatory phase, LH and FSH attain a peak level. In the luteal phase, LH is secreted by the anterior lobe of the pituitary gland which causes ovulation. The leftover graffiti follicle leads to the formation of corpus luteum which secrete progesterone which stimulates watery mucus secretion.

So, the luteal phase is known as the secretory phase.

Note: Luteal phase is one the phase of the menstrual cycle which known as a secretory phase because of production of watery mucus which is similar to secretion done by progesterone hormone (which is produced by corpus luteum).