Fertilisation & Early Development in Humans
Science: Year 5 & 6 National Curriculum, topic 2.1.1
Fertilisation & Early Development in Humans
Humans go through a lot of changes during their life cycle. The human life cycle starts with the fertilisation of an embryo and ends with death.

Fertilisation
- Early development of humans begins after fertilisation.
- Cells in the foetus grow and divide, and become different types of cells.
- Human features develop, and a baby is born.

Early development
- Once a baby is born, the baby grows very quickly in the first two years.
- A baby relies heavily on its mother for milk in its early life.
- Once a baby can walk, the baby becomes a toddler.
- A toddler continues to grow steadily into a child until adolescence.
Test yourself on Fertilisation & Early Development in Humans
Early development of humans happens after which event?
When does a baby become a toddler?
For how many years does a human baby grow very quickly, before it becomes a toddler?