Biology · KS3 Y7 · Reproduction & Genetics

Puberty & adolescence

Puberty & adolescenceFree7:05Heddy Score 3 of 7, below the standard

What you need to know

  • At puberty, oestrogen and testosterone cause the changes that make the body able to reproduce.
  • The menstrual cycle includes shedding of the uterus lining, rebuilding of that lining, release of an egg, and keeping the lining ready.
  • FSH and LH from the pituitary make an egg mature and be released. Oestrogen and progesterone from the ovaries control the lining.
  • As oestrogen and progesterone rise they inhibit FSH and LH, an example of negative feedback, until the cycle restarts if there is no pregnancy.

In this clip

0:07–6:35Hormones in reproduction and the menstrual cycle
Also coversPuberty & adolescence
Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

209K views · 2.47K likes · Cognito 1.37M subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

Puberty hormones and the four menstrual hormones are taught as one control system, including the negative feedback.

Cognito on YouTubechecked 2026-10-20

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