Human Reproduction (Menstrual Cycle)

Question 1

What is menstrual cycle

Answer 1

The reproductive phase in female primates egg monkeys humans apes

Question 2

Define menarche

Answer 2

The first menstruation begins at puberty and is called menarche

Question 3

Menstrual cycle definition

Answer 3

In human females menstruation is repeated at an average interval of about 28/29 days and the cycle of events from one menstruation till the next one is called the menstrual cycle

Question 4

When does ovulation occur in each menstrual cycle

Answer 4

One ovum is repeased (ovulation) during the middle of each menstrual cycle

About 14th day

Question 5

First phase of menstrual cycle

Answer 5

The cycle starts with the menstrual phase when menstrual flow occurs it lasts for 3-5 days

Question 6

What causes menstrual flow
Menstrual fluid constituents

Answer 6

The menstrual flow results due to breakdown of endometrial lining of the uterus and it’s blood vessels which forms liquid that comes out through vagina

Question 7

Menstruation and pregnancy relation

Answer 7

Menstruation inly occurs if the released ovum is not fertilized
Lack of menstruation may be indicative of pregnancy

Question 8

What else apart from pregnancy causes Lack of menstrual cycle

Answer 8

It may be caused due to other underlying causes like stress poor health etc

Question 9

Define follicular phase

Answer 9

The menstrual phase is followed by the follicular phase
During this phase the primary follicles in the Ovary grow to become fully mature Graafian follicle and simultaneously the endometrium of uterus regenrstes through proliferation

Question 10

What induces follicular / proliferate phase changes

Answer 10

These changes in the Ovary and the uterus are induced by changes in the levels of pituitary and ovarian hormones