The average length of a newborn baby is 18-20 inches (45-50 cm).

The average weight of a newborn baby is 5-7 pounds (2.25-3.18 kg).

The head circumference of a newborn baby is 13-15 inches (33-38 cm).

Newborns typically start to smile between 4-6 weeks of age.

Newborns typically start to coo between 2-4 weeks of age.

Newborns typically start to laugh between 4-6 months of age.

Newborns typically start to roll over between 4-6 months of age.

Newborns typically start to sit up between 6-8 months of age.

Newborns typically start to crawl between 8-10 months of age.

Newborns typically start to walk between 12-14 months of age.

Vitamins and minerals are the most important nutrients for a newborn baby.

Breast milk is the best source of nutrition for a newborn baby.

A newborn baby should be fed every 2-3 hours.

A newborn baby needs 16-18 hours of sleep per day.

All of the above are important for promoting healthy development in a newborn baby.