Development Facts

Female brains typically reach full maturity in the early-to-mid 20s, while male brains don't fully mature until the mid-to-late 20s, primarily due to differences in prefrontal cortex development.

Babies cry but they don't produce tears until one to three months after birth.

While newborns have tear glands from birth, they typically do not produce visible crying tears until they are approximately two weeks to three months old.

A puppy is born blind, deaf, and toothless.