20 Weeks Pregnant
At 20 weeks pregnant your baby is about the size of a banana. You are in the second trimester, and this week brings its own small changes — for your baby and for you.
You are halfway there.
- Size of
- a banana
- Length
- 25.6 cm
- Weight
- 300 g
- Trimester
- 2
Your baby this week
- Your baby swallows amniotic fluid, practising for feeding.
- Hair starts to grow on the scalp.
- Movements become smoother and more coordinated.
Your body this week
- The top of the uterus reaches your navel — a classic week-20 landmark.
- Weight gain becomes steady, usually a few hundred grams a week.
Common symptoms
- A dull ache in the lower back
- Getting out of breath more easily
- More vaginal discharge, thin and milky white
What to expect
The middle months are usually the steadiest part of pregnancy. Energy often returns, the bump becomes visible, and appointments settle into a routine. With 20 weeks to go, this is a good time to plan ahead while you feel well.
Tips for this week
- The anomaly scan checks your baby’s organs, growth and the placenta in detail.
- Start noticing your baby’s pattern of movement.
- Begin thinking about your birth preferences and where you want to give birth.
Frequently asked questions
How many months is 20 weeks pregnant?
20 weeks is about 4.5 months. Pregnancy months do not divide evenly into weeks, so counting in weeks is more precise.
How big is my baby at 20 weeks?
At 20 weeks your baby is around a banana — roughly 25.6 cm long and about 300 g. Healthy babies vary a lot around these averages.
What symptoms are normal at 20 weeks pregnant?
The most common ones this week are listed above. Contact your doctor or midwife about heavy bleeding, severe pain, a fever, or any change in your baby’s movements.
Pregnancy weeks are counted from the first day of your last period, so week 1 begins before conception.
This article is for general information only and is not medical advice. Always talk to your doctor or midwife about your own pregnancy.