Puberty in girls and the first period

Written by: the Essense teamPublished: Medical review: pending. This article will be reviewed by a doctor before publication.

A mother and daughter talking on the sofa

The first period is one of the topics girls and parents think about most. When a child knows what to expect, she feels more confident.

When does puberty start in girls?

According to the NHS, puberty can start at any point between about 8 and 14[1]. In girls the changes include breast development and the start of periods, as well as pubic and underarm hair[1].

When does the first period come?

The NHS says most girls start their periods at around 12, but they can start as early as 8[2].

What is normal at first

How to prepare her

When to talk to a doctor

The NHS advises seeing a doctor if periods haven't started by 15[2]. It also advises a non-urgent appointment if signs of puberty appear before 8[3].

Read also: What is puberty? · Puberty in boys · Curriculum

Sources

  1. NHS. Puberty (last reviewed 2 April 2026) (2026). www.nhs.uk/conditions/puberty/ (opens in a new tab)
  2. NHS. Starting periods (last reviewed 5 January 2023) (2023). www.nhs.uk/conditions/periods/starting-periods/ (opens in a new tab)
  3. NHS. Early or delayed puberty (last reviewed 2 April 2026) (2026). www.nhs.uk/conditions/early-or-delayed-puberty/ (opens in a new tab)