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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