Third trimester · Week 28 of 40
28 weeks pregnant: the size of a eggplant
The baby can blink, and the brain is developing billions of neurons.
Reviewed against ACOG, NHS and WHO guidance · Updated November 2026
Typical size
About 37 cm · 1 kg
70% of the way to your due date
Your baby this week
The baby can blink, and the brain is developing billions of neurons.
Your body this week
Welcome to the third trimester. If you are Rh-negative, you may receive an anti-D injection.
Tip for week 28
Ask about the Tdap (whooping cough) vaccine, usually given between weeks 27 and 36.
Carry this guide in your pocket
Mamivaa is a free pregnancy app with a week-by-week tracker, vitamin and water reminders, a food scanner and a baby checklist.
Start freeThis guide offers general information and does not replace advice from your doctor or midwife. If something feels wrong, contact your provider or emergency services.