List of top Biology Questions on Menstrual Cycle

Assertion (A): Corpus luteum secretes the hormone, progesterone. Reason (R): Hormone Progesterone is essential for maintenance of the endometrium.

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: During menstrual cycle, the ovulation takes place approximately on 14^th day.
Reason R: Rapid secretion of LH in the middle of menstrual cycle induces rupture of Graafian follicle and thereby the release of ovum.
In the light of the above statements, choose the most appropriate answer from the options given below.

Arrange the following menstrual phases in order:

(b) For successful pregnancy, at what phase of the menstrual cycle an early embryo (up to 3 blastomeres) should be implanted in the uterus (IUT) of a human female who has opted for Assisted Reproductive Technology (ART)? Support your answer with a reason.

The world is facing accelerated rates of species extinction largely due to human activities. Explain any three human activities responsible for accelerated rates of species extinction.

In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the graph given below regarding menstrual cycle and answer the questions that follow: \begin{figure}[h!] \centering \includegraphics[width=0.8\textwidth]{Screenshot 2025-01-17 101211.png} % Replace 'path_to_your_image.png' with the actual path to your graph image \caption{Graph showing the hormonal regulation and events during the menstrual cycle.} \label{fig:menstrual_cycle} \end{figure} Name the hormones and their source organ, which are responsible for menstrual cycle at puberty.

In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the graph given below regarding menstrual cycle and answer the questions that follow: \begin{figure}[h!] \centering \includegraphics[width=0.8\textwidth]{Screenshot 2025-01-17 101211.png} % Replace 'path_to_your_image.png' with the actual path to your graph image \caption{Graph showing the hormonal regulation and events during the menstrual cycle.} \label{fig:menstrual_cycle} \end{figure} For successful pregnancy, at what phase of the menstrual cycle can an early embryo (up to 3 blastomeres) be implanted in the uterus (IUT) of a human female who has opted for Assisted Reproductive Technology (ART)? Support your answer with a reason.

From the following table, select the option that correctly characterizes various phases of menstrual cycle :

	Menstruation phase	Follicular phase	Luteal phase
(1)	Regeneration of endometrium	High level of progesterone	Developing corpus luteum
(2)	Matured follicle	Regression of corpus luteum	Ovulation
(3)	Menses	Developing corpus luteum	Follicle maturation
(4)	Menses	L.H. Surge	Regeneration of endometrium

In which of the following mammals the menstrual cycle occur ?

Arrange the following in correct sequence with respect to the events of menstrual cycle:
(A) Development of primary follicle to graafian follicle 
(B) Attainment of peak level in luteinising hormone 
(C) Release of ovum by graafian follicle 
(D) Formation of corpus luteum 
Choose the correct answer from the options given below: 
 

Menstrual cycle exhibited by

The accompanying diagram shows the changes that take place in the endometrium during a normal menstrual cycle. Identify the changes and select the correct option.

Level of progesterone is highest

The main function of mammalian corpus luteum is to produce:

The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic.

Menstrual flow occurs due to lack of

The secretory phase in the human menstrual cycle is also called

Progesterone is secreted by

Repair of endometrium is undertaken by

Mature Graafian follicle is generally present in the ovary of a healthy human female around

Proliferation of endometrium of uterus is controlled by