medium importancemedium difficulty6 min

Menstrual Cycle

The menstrual cycle is the monthly series of changes in the female reproductive system that prepares the body for pregnancy.

In one line: Cycle prepares, menstruation clears.

Practice This Concept

Understand it

The menstrual cycle involves changes in the ovaries and uterus. An egg matures, the uterine lining thickens, and if fertilisation does not happen, the lining is shed as menstruation. In Class 10, students should understand the sequence and its role in reproduction.

Example

If no fertilisation occurs, the thickened uterine lining breaks down and comes out through the vagina as menstruation.

Rule to remember

Menstrual cycle prepares the reproductive system for pregnancy; if fertilisation does not occur, menstruation follows.

See it worked out

Follow the example line by line, then use the same method on new questions.

Worked example

1If a girl has no fertilisation after ovulation, the uterus does not need the thick lining and it is shed.
2This is why menstruation occurs at the end of that cycle.

Method you can reuse

1Note whether the question is about the monthly cycle.
2Check if it refers to preparation of uterus and egg release.
3If fertilisation does not happen, the lining is shed.
4Use the terms menstruation and menstrual cycle correctly.

Visual tip

A cycle diagram with ovary, uterus, egg release, and menstruation stages is very helpful.

Check yourself

Answer the question in your head before opening the answer.

Try it yourself

If fertilisation does not happen, which part of the uterine lining is removed from the body?

Think first, then show answer

The thickened uterine lining is shed from the body as menstruation. This is one part of the menstrual cycle when pregnancy has not occurred.

Common wrong answer

A common wrong answer is to say menstruation is the whole cycle.

Why it loses marks: Menstruation is only one stage of the cycle.

Don't mix this up

Students often think menstruation is the same as the entire menstrual cycle. Menstruation is only one part of the full cycle.

Exam tip

Remember the cycle as preparation, release, possible fertilisation, and shedding if pregnancy does not occur.

Write it in the exam

Each point is worth about one mark. Write point 1 for a 1-mark question and keep adding points as the marks go up.

How CBSE asks it

Questions may ask for the role of the menstrual cycle, the difference between menstruation and the full cycle, or the condition under which menstruation occurs.

1
Enough for 1 mark
The menstrual cycle is the monthly series of changes in the female reproductive system that prepares the body for pregnancy.
2
Add for 2 marks
Example: If no fertilisation occurs, the thickened uterine lining breaks down and comes out through the vagina as menstruation.
3
Add for 3 marks
The menstrual cycle involves changes in the ovaries and uterus.

MCQ Quiz

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