Key takeaways
- In the ninth month, your baby is about 48–52 cm (2.8–3.5 kg) — the size of a watermelon.
- Lungs mature is a key milestone this month.
- Common symptoms include baby drops into the pelvis and frequent urination.
- This month's key check: growth and Doppler scan to check size, fluid and blood flow.
The ninth month (weeks 33–40) is the final stretch. Your baby's lungs mature, it drops lower into the pelvis, and your body prepares for labour. Now about the size of a watermelon (48–52 cm, around 2.8–3.5 kg), your baby is nearly ready to meet you.
How big is the baby in the ninth month?
Your baby is about 48–52 cm (2.8–3.5 kg), roughly the size of a watermelon.
What is developing this month?
Key milestones in the ninth month include:
- Lungs mature
- Brain continues developing
- Baby prepares for birth
- Fat stores increase
What symptoms can you expect in the ninth month?
Every pregnancy is different, but common symptoms this month include:
- Baby drops into the pelvis
- Frequent urination
- Pelvic pressure
- Irregular contractions
What should you do this month?
- Attend your weekly antenatal visits
- Pack your hospital bag and finalise your birth plan
- Keep counting your baby's movements
- Learn the signs of labour and when to go to hospital
Which tests or scans are done in the ninth month?
Final checks confirm your baby is ready and well-positioned for birth.
- A growth and Doppler scan to check size, fluid and blood flow
- Group B Streptococcus (GBS) screening (around 36 weeks) where advised
- A check of your baby's position, plus blood pressure, urine and, where needed, CTG/NST monitoring