3rd trimester · Week 28
28 weeks pregnant
Third trimester and antibody timing
Week 28 is widely used as the start of the third trimester. Eyes open and close. Fat rounds the face. Kick-count conversations often start if they have not already.
How big is your baby at 28 weeks?
- Length
- 37.6 cm
- Weight
- 1,005 g
- Size
- Banana
On average about 37.6 cm long and 1,005 g. Size comparison: Banana.
These are averages; every baby grows at their own pace.
How is your baby developing at 28 weeks?
Brain tissue is folding. The fetus can blink. Length is often about 37–38 cm; weight commonly near 1 kg. Bones are harder, but the skull stays pliable for birth.
What changes in your body at 28 weeks?
Shortness of breath, backache, and Braxton Hicks after a long day are typical. Some people have a glucose test this week if not done at 24–28 weeks.
Tips for this week
If RhD-negative, this is a common week for anti-D. Ask how your clinic wants you to track movements (for example, contact them if the usual pattern drops). Preterm labor signs — regular painful tightenings, fluid leak, bleeding — need urgent assessment.
