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Menstruation 101

माहवारी की बुनियादी बातें

What a period is, why it happens, and what a healthy cycle looks like.

Want to talk to someone? Our free menstrual helpline: 85888 70999

The Period Fairy and the children set off in a glowing bubble boat
A journey inside the body. From our comic, The Period Fairy

Your cycle in four parts

Each month the body gets ready for a possible baby. If there is no baby, the lining comes out as a period.

Children ride a merry-go-round with four seats: Period days, Building the bed, The egg’s turn, Waiting days
  1. Period days

    The lining of the womb comes out as blood through the vagina. This is your period.

  2. Building the bed

    Hormones make a new, soft lining grow inside the womb.

  3. The egg’s turn

    An ovary lets go of a tiny egg. This is called ovulation.

  4. Waiting days

    The lining waits. If the egg is not fertilised, the lining breaks down and the next period starts.

What is a normal cycle?

Every body is different. These are the usual ranges.

Usually normal

  • A period every 21 to 35 days, counted from the first day of one period to the first day of the next
  • Bleeding for about 2 to 7 days
  • Irregular cycles in the first two years after periods start
  • Some change in your cycle with stress, illness or travel

See a doctor if

  • Periods come more often than every 21 days
  • Periods stop for three months and you are not pregnant
  • Bleeding lasts more than a week, or is very heavy
  • You bleed between periods

Keep track of your cycle

Knowing your pattern helps you plan, and helps a doctor if you ever need one.

The Flow Queen gives Rosy a small calendar card and a red pen

Mark day one

Put a red dot on the day your period starts.

Note the flow

Light, medium or heavy. A short note is enough.

Note how you feel

Cramps, mood, tiredness. Patterns show up over a few months.

Count the days

From one day one to the next. That is your cycle length.

Use our period calculator

Enter your dates to see when your next period is likely.

Common questions, answered simply

What is menstruation?

A monthly flow of blood and tissue from the womb, out through the vagina. It is also called a period.

  • It is a normal, healthy part of growing up.
  • It usually lasts a few days.
Is menstruation a disease or something dirty?

No. It is a natural process that shows the body is healthy and growing.

  • Period blood is not dirty or impure.
  • Girls and women can do all their normal work during their period.
Why does menstruation happen?

Each month the womb prepares a soft lining for a baby. If there is no baby, the lining comes out.

  • Hormones from the brain and ovaries control this.
  • It repeats every month until menopause.
When do periods usually start?

Often between about 10 and 15 years of age, but every girl is different.

  • Breasts and body hair usually start growing first.
  • See a doctor if periods have not started by about 15.
How long does a period last?

Usually about 2 to 7 days.

  • Bleeding is often heavier in the first days and lighter at the end.
What is ovulation?

The day an ovary lets go of an egg, usually around the middle of the cycle.

  • Some women feel a small pain on one side, or notice clear, stretchy discharge.
  • This is the time in the cycle when pregnancy is most likely.
What do hormones do in the cycle?

They act like messengers that tell the ovaries and womb what to do and when.

  • The main ones are oestrogen and progesterone.
  • Changes in them can also affect mood and energy.
What can change my cycle?

Stress, illness, travel, weight change, heavy exercise and some medicines.

  • Conditions like PCOS or thyroid problems can also change it.
  • One unusual month is common. A pattern of changes is worth checking.
Which day is day one of my cycle?

The first day of proper bleeding, not light spotting.

  • Count from that day to the next day one to find your cycle length.
How do I track my cycle?

Mark the first day of each period on a calendar or in our period calculator.

  • Note how heavy it is and how you feel.
  • After a few months you will see your own pattern.
When should I see a doctor about my periods?

If your periods are very heavy, very painful, very irregular, or stop for three months.

  • Also if you bleed between periods.
  • Bring your calendar notes. They help the doctor a lot.

Ask us. No question is too small.

Free menstrual helpline: 85888 70999. Call and talk to someone who understands periods.

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What next?

Help a girl get through her period safely

₹1,100 gives one girl a year. Eligible for tax deduction under Section 133 of the Income-tax Act, 2025 (earlier Section 80G). Help a girl stay in class. More to learn.

Pinkishe Foundation – menstrual health information for girls
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Menstruation 101
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How can I track my menstrual cycle?
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Put a red dot on a calendar on the first day of each period. Count the days from one red dot to the next. That is your cycle. You can also note how heavy the flow is and how you feel.

After three or four months, you will see your pattern. Our free period calculator shows when your next period is likely.

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How will I know my first period is coming?
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Your body gives some signs. Your breasts start to grow, usually about two years before the first period. Hair grows under your arms and in your private area. Some months before, you may see a white or clear discharge in your underwear. That is normal.

Most girls get their first period between 10 and 15. Keep a pad in your school bag, so you are ready. See a doctor if breasts start to develop before 8, the first period comes before 10, or periods have not started by 15.

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How long does menstruation last?
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Bleeding usually lasts 2 to 7 days. The first days are often heavier. Tell an adult or see a doctor if bleeding lasts more than 7 days.

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How much blood will I lose during my period?
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Less than it looks. Over a whole period, most girls and women lose about 30 to 40 ml, two to three tablespoons. Some months are heavier, some lighter. Small clots, smaller than a one-rupee coin, can be normal on heavy days.

See a doctor if you soak a pad every one or two hours, or feel very tired, dizzy or breathless.

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Is menstruation a disease?
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No. A period is a normal, healthy part of growing up. It shows that a girl’s body is working as it should. A period is not dirty, and it does not make a girl or woman impure. If something about your period worries you, talk to your mother, a didi or a doctor.

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What are the stages of the menstrual cycle?
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The cycle has four parts.

  • Period days: the lining of the womb comes out as blood through the vagina.
  • Building the bed: hormones make a new, soft lining grow inside the womb.
  • The egg’s turn: an ovary lets go of a tiny egg. This is called ovulation.
  • Waiting days: the lining waits. If the egg is not fertilised, the lining breaks down and the next period starts.

In science books you may see these called the menstrual phase, follicular phase, ovulation and luteal phase. A cycle is counted from the first day of one period to the first day of the next.

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What causes menstruation?
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Each month, hormones make a soft lining grow inside the womb (uterus), ready in case a baby starts to grow. An ovary lets go of a tiny egg. If the egg is not fertilised, the body does not need the lining. It comes out through the vagina as blood. This is your period.

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What factors can affect menstruation?
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Stress, illness, travel, a big change in weight, very hard exercise and some medicines can change your periods for a while. In the first two years, changes are common. Health problems such as thyroid trouble or PCOS can also change periods. If your periods stay very different from your usual pattern, see a doctor.

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Is it normal for periods to be irregular at first?
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Yes. In the first two or three years, periods are often irregular. Your period may come every 21 to 45 days. Later it often settles to every 21 to 35 days. Mark the first day of each period on a calendar, and you will soon know your own pattern.

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What helps with period pain?
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Some cramping on the first day or two is common. A hot water bottle or a warm towel on your lower tummy or back helps. So do a warm bath, gentle walking or stretching, drinking water and rest.

Do not take any medicine for period pain without asking your parent or a doctor first. See a doctor if pain makes you miss school again and again, if you vomit or faint with the pain, or if warmth and rest do not help.

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When should I see a doctor about my periods?
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Talk to your mother, a didi or a doctor if:

  • your period comes closer than 21 days apart, or more than 45 days apart, after the first two years;
  • it lasts more than 7 days;
  • you soak a pad every one or two hours;
  • you feel very tired, dizzy or breathless;
  • your periods stop for three months;
  • you bleed between periods;
  • you are 15 and your period has not started.

You can also ask us privately on our free menstrual helpline: 85888 70999.

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How often should I change my pad?
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Change your pad every 4 to 6 hours, even if it does not look full. Change it sooner on heavy days. Wash your hands before and after. Wrap the used pad in paper or its cover and put it in a dustbin. Do not flush it.

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