Week 21: Week 21: Baby Sleeps and Wakes Regularly

The baby's lungs begin to develop. Footprints and fingerprints are forming, and the baby begins to develop a sleep cycle.

Baby's Size

Size Comparison

Carrot

Weight

About 600 grams

Length

About 11.8 inches (30 cm)

Trimester

Second Trimester

Read About Baby's Development