it's urgent, menstrual cycle.sketch the labeled diagram
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Answer:
The menstrual cycle is a reproductive cycle which takes place in the females of the group of primates. The menstrual cycle is divided into four phases:
(i) Menstrual phase: It extends from 1 st to 4th
day of the cycle. It occurs in the absence of fertilization. During this phase, bleeding occurs as the endometrium of the uterus is sloughed off.
(ii) Follicular phase: When the ovary is in this phase, uterus enters in the proliferative phase. This takes place from 5th to 13th day of the cycle.
(iii) Ovulatory phase: During this phase, ovulation takes place. It usually occurs on 14th day. Mature Graafian follicle ruptures due to LH secreted by pituitary.
(iv) Luteal phase: It corresponds with the secretory phase in uterus. It takes place between 15 th to 28th day of the cycle.
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