Pregnancy week by week

33 weeks pregnant

At 33 weeks you are in month 8 and the third trimester. Your baby is about the size of a melon: 43.7 cm and 2.1 kg.

As big as

melon

Length

43.7 cm

Weight

2.1 kg

Month

8

Trimester

third trimester

To go

49 days

Averages. Measured crown to rump up to week 20, crown to heel after that. Healthy babies vary a lot.

Your baby this week

The skeleton keeps hardening; the skull stays flexible for birth.

Your body

Warm hands and feet: your blood volume has grown a lot.

Good to know

The immune system picks up antibodies from you for after birth.

To sort around these weeks

  • Agree your leave start date with your employer.
  • Write a birth plan and go through it with your midwife.

Follow your pregnancy week by week

In PERIOD. baby you see every week how big your baby is, what is happening and what you can arrange. No ads, and we never sell your data.

4.8on the App Store
100,000+women
Download on the App StoreGet it on Google Play

Frequently asked questions

How many months is 33 weeks pregnant?

33 weeks pregnant falls in month 8 of your pregnancy.

Which trimester is 33 weeks?

At 33 weeks you are in the third trimester.

How big is a baby at 33 weeks?

On average 43.7 cm, about the size of a melon. Healthy babies vary a lot.

How long to go at 33 weeks?

Until your due date (40 weeks): 7 weeks, 49 days.

All weeks

General information, not medical advice. If in doubt, call your midwife or GP. Sources: WHO fetal growth charts (Kiserud et al., PLoS Med 2017); Robinson and Fleming 1975; NHS, Your pregnancy and baby guide.