Weight: ~1.1 pounds (0.5 kg), the size of a Grapefruit!

Length: ~11.5 inches (29 cm)

Development Highlights:

• Lungs developing tiny air sacs; respiratory system not yet functional.

• Bones hardening, but skull remains soft.

• Hair on the head becoming visible; eyebrows forming.

• Eyes developing pigment; may start opening and closing.

Movements: More noticeable kicks and rolls; baby may respond to external stimuli like sound.