An unborn human baby more than eight weeks after conception.

A person's characteristic nature or emotional excitability

The Fertilized Egg.

The baby's tendency when their cheek is touched to open their mouth and look for a food source.

All mental activities are associated with thinking and memory.

Concepts or mental frameworks that organize categories and interpret information

Interpreting new experiences by relating them to existing schemas

Adapting current schemas to bring in new information.

Sigmund Freud's theory of early childhood development is known as the stages of