What are the signs of female puberty, and what changes when?

How do the signs of female puberty unfold over time?

The signs of female puberty follow a steady overall direction, from breast buds through a growth spurt to a first period, while the pace is personal. The order of the smaller changes can vary from girl to girl. In the UK, the NHS lists breast development, pubic and underarm hair, and periods as the signs of puberty.

When the time comes, our guide to the first period covers what is normal once it arrives, and nutrition in puberty looks at what a growing body draws on during these years of fast growth.

For the years before this one, what changes in childhood sets out the quieter stage that leads up to puberty. For the years after, once cycles have found their rhythm, menstrual cycle phases explains what each part of the month is doing.

Change, evidence, what helps

When is a puberty change worth a doctor's visit?

A change is worth a doctor's visit when it arrives well outside the usual window, gets in the way of school, sleep or sport, or simply keeps worrying you. Most of what happens in these years sits within the normal range, and a visit is as much for reassurance as for treatment. A few patterns have names, and our women's health conditions index lists them in one place.

Some are worth knowing early. Period pain that keeps a girl home from school is one reason to read about endometriosis, and acne that comes with excess hair growth is a reason to read about PCOS. Tiredness that won't lift is covered in iron deficiency anemia treatment (spelled anaemia in the UK). Mood that dips hard in the days before each period is the subject of our page on PMDD, and cycles that stay unpredictable, or stop altogether, are covered in irregular periods.

Timing matters too. The American Academy of Pediatrics suggests a check if changes begin before age 8 or if there are none by 13; in the UK, the NHS also flags signs before 8 as possible early puberty and says no signs by 15 may be delayed puberty. Our page on early puberty explains what that check involves. In the US the first stop is usually a pediatrician or family doctor, and in the UK a GP.

What helps with skin, period pain and sport during puberty?

For skin, a pharmacist is a good first conversation in both the US and the UK, where breakouts are often simply called spots. If acne is moderate or leaving scars, it's worth asking a doctor or pharmacist early rather than waiting it out.

Period pain that stops a girl doing what she enjoys is worth a conversation rather than something to put up with. Our page on menstrual cramps covers what eases them, and heavy periods explains what counts as heavy and what can be done about it.

For sport, when periods stop in a girl who trains hard, the cause can be too little energy coming in for the work going out, which is covered in RED-S (Relative Energy Deficiency in Sport; Mountjoy et al., 2023). Puberty is also when vaccines come up at checkups, and when to get the HPV vaccine sets out the schedule for the US and the UK.

Next steps

A good place to start is simply noticing: which changes have arrived, which are on their way, and whether anything on the red-flag list sounds familiar. If something does, a visit to your doctor is the next step; if nothing does, time is doing its work. For a gentle estimate of what comes next, you might try our when will I get my first period quiz. Every girl moves through these years at her own pace, so take what fits your family and leave the rest: this is not one size fits all.