28 Weeks Pregnant
Reviewed by Safi Allah Khan
Medically reviewed by: Safi Allah Khan · Written by the Momi team · Last updated 20 October 2026
Quick answer: At 28 weeks pregnant, your baby is about the size of an eggplant (aubergine), about 37.6 cm (14.8 in) long. You're in the third trimester, in month 7, with 12 weeks to go until your due date. This week's milestone: third trimester begins. Symptoms vary from person to person.
| Week 28 at a glance | |
|---|---|
| Trimester | Third |
| Month | 7 |
| Weeks to due date | 12 |
| Baby's size | About the size of an eggplant (aubergine) |
| Length | About 37.6 cm (14.8 in) |
| Weight | About 1 kg (2.2 lb) |
| This week | Third trimester begins |
Sizes are typical averages. Before about 20 weeks, length is measured crown to rump; after that, head to heel.
Your baby at 28 weeks
Your baby is about the size of an eggplant (aubergine) and weighs about 1 kg (2.2 lb). ACOG says the fetus is nearly 15 inches long and about 2.5 pounds by the end of week 28. The lungs are making surfactant.
Your body at 28 weeks pregnant
Welcome to the third trimester. Tiredness may return, and you may need to pee often again. The NHS advises going to sleep on your side from 28 weeks.
Things to do this week
- Attend your 28-week check. If you're Rh-negative, you may be offered an anti-D injection.
- Go to sleep on your side, not on your back.
- Learn your baby's usual movement pattern and call straight away if it changes.
When to call your doctor or midwife
Contact your care team straight away if:
- your baby is moving less than usual, has stopped moving, or the pattern has changed. The NHS says to call immediately, even in the middle of the night
- you have a severe headache, vision changes, pain below your ribs or sudden swelling (possible pre-eclampsia)
- you have intense itching, especially on the palms of your hands or soles of your feet
- you have contractions, your waters break or you bleed before 37 weeks
- you have a fever of 100.4°F (38°C) or higher
If something feels wrong, trust that feeling and call. In an emergency, call your local emergency number.
Track week 28 in Momi
Use Momi's kick counter each day if your provider recommends it, and note how long 10 movements take. Momi follows your pregnancy week by week with your baby's size and development, and keeps your diary, bump photos, appointments, kick counts and contractions in one place.
Download Momi free on the App Store or Google Play. Free with ads; optional Premium.
Keep reading
← 27 weeks pregnant · All weeks · 29 weeks pregnant →
Sources
- ACOG: Changes During Pregnancy (infographic)
- NHS: Your baby's movements
- NHS: Antenatal care and appointments
- CDC: Urgent Maternal Warning Signs
Medical disclaimer: Momi and this website provide general information, not medical advice. Always talk to your doctor or midwife; in an emergency call your local emergency number.
FAQ
How big is a baby at 28 weeks pregnant?
On average, a baby at 28 weeks is about the size of an eggplant (aubergine): about 37.6 cm (14.8 in), about 1 kg (2.2 lb). These are typical averages, and healthy babies vary.
How many months is 28 weeks pregnant?
28 weeks pregnant is in the seventh month of pregnancy and the third trimester. Months don't divide evenly into 40 weeks, so different sources may label the month slightly differently.
What should I do at 28 weeks pregnant?
Attend your 28-week check. If you're Rh-negative, you may be offered an anti-D injection. Go to sleep on your side, not on your back.
Related guides
Track this in Momi
Momi is a free pregnancy tracker app for iPhone and Android that follows pregnancy week by week, estimates the due date, and keeps a pregnancy journal, weight log, kick counter and contraction timer in one place.
