Which one of following is most likely root cause why menstruation is not taking place in regularly c

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2.Human Reproduction

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Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

Maintenance of the hypertrophical endometrial lining

Maintenance of high concentration of sex hormones in the blood stream

Retention of welldeveloped corpus luteum

Fertilisation of the ovum

(AIPMT-2009)

Solution

(b) : High concentration of sex steroids (estrogen) exerts negative feedback on anterior pituitary, decreasing $LH$ secretion and release thus, lowering $LH$ level in blood. Due to insufficient $LH$ – level no ovulation occurs which causes irregular menstruation.

Standard 12

Biology

Mention the importance of $LH$ surge during menstrual cycle.

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Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A$: Endometrium is necessary for implantation of blastocyst.

Reason $R$: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.

In the light of the above statements, choose the correct answer from the options given below:

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(NEET-2023)

Match the items given in the Column $I$ with those in Column $II$ and select the correct option given below:

Column $I$

Column $II$

$(a)$ Proliferative Phase

$(i)$ Breakdown of endometrical lining

$(b)$Secretory Phase

$(ii)$ Follicular phase

$(c)$ Menstruation

$(iii)$ Luteal Phase

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(NEET-2018)

Match the columns.

Column 1 Column II

$(a)$ $6-14$ days $(1)$ It is known as menstrual cycle

$(b)$ $1-5$ days $(2)$ Polar body is down

$(c)$ $15-28$ days $(3)$ It is known as proliferative phase

$(4)$ Endometrium is prepared forimplantation of embryo

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Menstrual flow occurs due to lack of

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(NEET-2013)

Column $I$	Column $II$
$(a)$ Proliferative Phase	$(i)$ Breakdown of endometrical lining
$(b)$Secretory Phase	$(ii)$ Follicular phase
$(c)$ Menstruation	$(iii)$ Luteal Phase

Column 1	Column II
$(a)$ $6-14$ days	$(1)$ It is known as menstrual cycle
$(b)$ $1-5$ days	$(2)$ Polar body is down
$(c)$ $15-28$ days	$(3)$ It is known as proliferative phase
	$(4)$ Endometrium is prepared forimplantation of embryo

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

Solution

Similar Questions

Mention the importance of $LH$ surge during menstrual cycle.

Match the items given in the Column $I$ with those in Column $II$ and select the correct option given below: Column $I$ Column $II$ $(a)$ Proliferative Phase $(i)$ Breakdown of endometrical lining $(b)$Secretory Phase $(ii)$ Follicular phase $(c)$ Menstruation $(iii)$ Luteal Phase

Match the columns. Column 1 Column II $(a)$ $6-14$ days $(1)$ It is known as menstrual cycle $(b)$ $1-5$ days $(2)$ Polar body is down $(c)$ $15-28$ days $(3)$ It is known as proliferative phase $(4)$ Endometrium is prepared forimplantation of embryo

Menstrual flow occurs due to lack of

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Match the items given in the Column $I$ with those in Column $II$ and select the correct option given below:

Column $I$

Column $II$

$(a)$ Proliferative Phase

$(i)$ Breakdown of endometrical lining

$(b)$Secretory Phase

$(ii)$ Follicular phase

$(c)$ Menstruation

$(iii)$ Luteal Phase

Match the columns.

Column 1 Column II

$(a)$ $6-14$ days $(1)$ It is known as menstrual cycle

$(b)$ $1-5$ days $(2)$ Polar body is down

$(c)$ $15-28$ days $(3)$ It is known as proliferative phase

$(4)$ Endometrium is prepared forimplantation of embryo