Week 30

Your Baby at Week 30

At 30 weeks, your baby is the size of a large cabbage. The bone marrow is now producing red blood cells, and the brain is developing the characteristic folds and grooves.

Key milestone: The baby's bone marrow takes over red blood cell production. The brain continues growing folds and grooves.

Your Body at Week 30

In the third trimester, your growing uterus presses against your diaphragm, stomach, and bladder. Shortness of breath, heartburn, and frequent urination are common. Your body is producing relaxin, a hormone that loosens joints and ligaments to prepare for birth.

Your baby at week 30 is the size of a Large cabbage, measuring about 10.8 in (27.4 cm) and weighing roughly 2.7 lb (1.25 kg). Every kick, roll, and hiccup is a sign that your baby is growing strong. Soon you'll hold them in your arms.

Your Baby's Development This Week

At 30 weeks, your baby is the size of a large cabbage. The bone marrow is now producing red blood cells, and the brain is developing the characteristic folds and grooves. The key milestone this week is that the baby's bone marrow takes over red blood cell production. the brain continues growing folds and grooves.

The third trimester is about preparation — your baby is practicing breathing, sucking, and swallowing for life outside the womb. Each week of this stage significantly improves their chances of a healthy start. The countdown to meeting your baby has begun.