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Teen periods and adolescent gynaecology: a guide for girls and parents

A first period, a cycle that won't settle, cramps that mean missing school — the teenage years bring questions that deserve gentle, honest answers. This guide is for girls, and for the parents supporting them.

Teen periods and adolescent gynaecology: a guide for girls and parents

Key facts

The first period and what's normal

The first period usually arrives around two years after breast development begins, most often between 10 and 15. Early cycles are frequently irregular — a gap of a few weeks one month and a couple of months the next is completely normal in the first two to three years while the body's hormone rhythm settles. Bleeding typically lasts 3–7 days.

Irregular periods in the early years

Irregularity itself isn't usually a worry at first. What's worth a check: no period by 15 (or three years after breast development), periods stopping for more than three months once they'd started, bleeding more often than every three weeks, or cycles still very irregular after three years.

Painful periods

Cramping in the lower tummy and back is common and usually eases with:

Heavy periods

Soaking through a pad or tampon every hour, passing large clots, or periods lasting more than seven days count as heavy and can cause tiredness from iron deficiency. This is very treatable — often with simple tablets — so it's worth mentioning rather than putting up with.

PCOS in teenagers

Polycystic ovary syndrome can show up in the teens as irregular periods, acne that won't clear, excess facial or body hair, or weight that's hard to manage. Diagnosis in teenagers is done carefully, because some of these features overlap with normal puberty. When it is PCOS, lifestyle changes and, if needed, simple treatments regulate cycles and protect long-term health — and starting early makes a real difference.

The HPV vaccine

HPV is a common virus that causes almost all cervical cancers. The vaccine is safe, well studied, and most effective when given between 9 and 14, before any exposure — two doses in this age group. Older teenagers and adults can still benefit. It's one of the few vaccines that directly prevents a cancer, and Dr. Ritika strongly recommends it.

What a visit is like

A first visit is mostly talking — about periods, growth, any worries — in a private, unhurried setting. Girls are welcome to speak with Dr. Ritika alone if they'd like, with a parent nearby. An internal examination is almost never needed in the teenage years; if anything more is required, an ultrasound over the tummy is usually enough, and every step is explained first.

Have a question about this?

The clearest next step is a calm consultation. Dr. Ritika will talk it through with you — no rush, no jargon.

Questions, answered

When should a girl first see a gynaecologist?

There's no set age — come whenever there's a concern: very painful or heavy periods, no period by 15, periods stopping for months, or questions about PCOS or the HPV vaccine. Many families find a first visit around 13–15 reassuring.

Are irregular periods normal for teenagers?

Yes, in the first two to three years after periods start. It becomes worth checking if periods stop for over three months, come more often than every three weeks, or are still very irregular after three years.

Is the HPV vaccine safe, and at what age is it given?

It's safe and thoroughly studied. It's best given between 9 and 14 (two doses); older teens and adults can still have it. It prevents the infection that causes almost all cervical cancers.

Will my daughter need an internal examination?

Almost never in the teenage years. A conversation, and sometimes an ultrasound over the tummy, is usually all that's needed — and nothing happens without explanation and consent.

What helps period pain at school?

A heat patch, pain relief taken at the first sign of cramps, staying active and keeping hydrated. If pain keeps causing missed days, it should be assessed — there are effective treatments.

Talk it through with Dr. Ritika

Consultations at Cloudnine Hospital, Phase 3 Industrial Area, Mohali · Mon–Sat, 10 AM – 5 PM.

Medically reviewed by Dr. Ritika Gupta, MS (Obs & Gyn), FMAS, DMAS — last reviewed 2026-09-20. Aligned with guidance from bodies such as ACOG, RCOG and the NHS.

General education only — not a substitute for a personal consultation. If you have urgent symptoms, seek care promptly.