What can you see happening?

Fertilization

New life begins when a sperm fertilizes an egg.

This is called fertilisation.

This type of reproduction is called sexual reproduction.

Describe what happens in fertilisation.

Use the terms and pictures to help you.

Fertilization

The sperm nucleus and the egg nucleus join (fertilization).

One sperm burrows into the egg cell, as it does so its tail breaks off

The sperm crowd round the egg cell.

During intercourse sperm are released into the vagina and swim into the uterus.

Sperm swim from the uterus to the oviduct, many sperm die.