top picks
Fertilisation (BBC Bitesize)
An explanation of fertilsation using a short video, which includes how gender is determined.

Sexual and asexual reproduction video clip (BBC Bitesize)
An interactive video clip that explains the differences between sexual and asexual reproduction (also called cloning).

Fertilisation (BBC Bitesize)
Learn how eggs and sperm fuse to form a new life.

Development of the foetus (BBC Bitesize)
Learn how a foetus develops in mammals and other animals.

Fertilisation and sex cells (BBC Bitesize)
Learn about fertilisation in humans and other animals and how gametes are adapated.

Infertility (BBC Bitesize)
Some couples are unable to have children. Visit this site to learn how they can be helped.

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 immune system
 blood cells
 biotechnology
 oils
 fertilisation
 menstrual cycle
 hormones
 sperm
 eggs
 infertility
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