GCSE Biology – The Menstrual Cycle & Puberty #43

Published on December 30, 2018 by

Hormones do many things in the body, two very important roles are controlling puberty and the menstrual cycle. Learn how these work and which hormones are involved.

The next two related videos will be on:
1 - Contraception
2 - Increasing fertility with hormones i.e. in vitro fertilisation

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  • Mohammed 3 years ago

    You are growing very fast. By the time it is May you will be on 50K subs.

    • Cognito 3 years ago

      We definitely hope you’re right!

    • anthony karanja 2 years ago


  • JAYJO 2 years ago

    thx for helping me for exams:)

    • Cognito 2 years ago

      Hi Jay thanks for the comment! And of course you’re 100% welcome!!!

  • lion off roader 2 years ago

    Thanks bro you help me for exam

    • Cognito 2 years ago

      You’re very welcome! Good luck πŸ™Œ

  • Ikhlaas H 2 years ago

    thank you so much I was confused and had a bio test

  • Noura als 2 years ago

    Thank you

  • Stefano 2 years ago

    does testosterone stimulate growth?

  • MAES β€˜ 2 years ago

    Thank you is never enough

  • Pesa 2 years ago

    tysm πŸ™‚

  • Alex Walsh 2 years ago

    thankyou for stimulating my day

  • surina 2 years ago

    Very helpful, thank you!

  • Dillon oconnell 2 years ago


  • John Galvan 2 years ago

    omg ty this so useful all other videos were either confusing or just straight up worng

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