AQA GCSE Biology contents

Unit 5 · Homeostasis & Response

Hormones in Reproduction & Contraception

3 min read · part of the full Exam Guide

Puberty and the sex hormones

  • During puberty reproductive hormones cause secondary sex characteristics to develop
  • Oestrogen is the main female reproductive hormone, produced in the ovaries. At puberty eggs begin to mature and one is released about every 28 days: ovulation
  • Testosterone is the main male reproductive hormone, produced by the testes; it stimulates sperm production

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In the full topic

  • Puberty and the sex hormones
  • The menstrual cycle
  • Contraception
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