30 Weeks Pregnant
At 30 weeks pregnant your baby is about the size of a cucumber. You are in the third trimester, and this week brings its own small changes — for your baby and for you.
- Size of
- a cucumber
- Length
- 39.9 cm
- Weight
- 1.32 kg
- Trimester
- 3
Your baby this week
- The fine lanugo hair starts to disappear.
- Bone marrow takes over making red blood cells.
- Movements become smoother and more coordinated.
Your body this week
- Third-trimester tiredness returns, often quite suddenly.
- Your centre of gravity shifts, so movements feel different.
Common symptoms
- Deep tiredness, even after a full night of sleep
- A dull ache in the lower back
- Mood that swings quickly, driven by hormones
What to expect
The last stretch asks a lot of your body. Sleep gets harder, movement slows down, and your appointments become more frequent. With 10 weeks to go, focus on rest, on knowing the signs of labour, and on having your bag ready.
Tips for this week
- Take short naps if nights are broken; tiredness builds up quickly now.
- Begin thinking about your birth preferences and where you want to give birth.
- Read about feeding options so the first days feel less unfamiliar.
Frequently asked questions
How many months is 30 weeks pregnant?
30 weeks is about 7 months. Pregnancy months do not divide evenly into weeks, so counting in weeks is more precise.
How big is my baby at 30 weeks?
At 30 weeks your baby is around a cucumber — roughly 39.9 cm long and about 1.32 kg. Healthy babies vary a lot around these averages.
What symptoms are normal at 30 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.