Question

what is menstrual cycle?
explain its phase also

Answer 1

A period which occurs in girl in between 10-12years of age in which the unfertilise eggs spread out of the body with the help of blood its is of three Phases. The ovarian cycle consist of follicular phase,
Ovulation and luteal Phase
Whereas uterine cycle consist of menstruation, proliferative phase, and Secretory phase

Answer 2

Menstrual Cycle

⇒Cyclic change occurs in the uterus, extending approximately a month period.

⇒ Menstrual cycle has three phases that is proliferative, secretory and menstrual phase.

Proliferative phase

⇒ FSH stimulates follicle to secrete estrogens.

⇒Phase has duration of 10-12 days.

⇒ It is also called follicular phase.

Secretory phase

⇒Corpus luteum secretes progesterone.

⇒ Phase has duration of 12-14 days.

Menstrual phase

⇒If ovum is not fertilized, the corpus luteum degenerate causing sudden fall in the progesterone level.

⇒Break down of endometrium takes place that results in discharge of blood.

⇒ It is controlled by FSH, LH, oestrogen and progesterone.

⇒ The menstrual cycle and menstruation remain suspended during pregnancy and lactation.