33 Weeks Pregnant
You’re 33 weeks pregnant — in the third trimester, and 7 weeks to go until your due date. Your baby is about the size of a pineapple this week.
How big is your baby at 33 weeks?
Size of a
pineapple
Length
~43.7 cm
Weight
~1918 g
Last week your baby was about the size of a squash; this week it's grown to roughly a pineapple.
Sizes are averages from standard fetal-growth references. Every baby grows at its own pace — your provider tracks yours at scans.
Baby development at week 33
The fetus's immune system is developing as antibodies pass from you, offering protection that lasts into early infancy. The bones are hardening, though the skull stays soft and flexible to ease the journey through the birth canal. The pupils can now constrict and dilate in response to light. About the size of a pineapple.
Your body at 33 weeks
Common symptoms many people notice around week 33 include:
- Aches in the pelvis and hips
- Numbness or tingling (carpal tunnel)
- Warmth and sweating from increased blood flow
- Trouble sleeping
Symptoms vary enormously from person to person and pregnancy to pregnancy. Not having a symptom on this list is just as normal as having it.
Tips for week 33
- Pelvic tilts and gentle stretches can ease hip aches
- Stay cool and hydrated
- Pack your hospital bag in the next week or two
What trimester is 33 weeks?
Week 33 falls in the third trimester. As a quick map: the first trimester runs weeks 1–13, the second covers weeks 14–27, and the third is week 28 through birth (a due date is set at 40 weeks). Want your own dates? Our Pregnancy Due Date Calculator shows your due date and exactly how far along you are today.
The third trimester (weeks 28–40+) is about growth and getting ready for birth. Prenatal visits become more frequent, the baby gains most of its weight, and you'll watch for the signs of labour. Tiredness and physical discomfort tend to return as the due date approaches.
Frequently asked questions
- How many months is 33 weeks pregnant?
- 33 weeks pregnant is about 8 months. Pregnancy months don't divide evenly into 4-week blocks, so week-to-month conversions are approximate — most providers track pregnancy by week, not month.
- How big is the baby at 33 weeks?
- At 33 weeks, the baby is about the size of a pineapple, roughly 43.7 cm and around 1918 g. These are averages — healthy babies vary, and your provider tracks your baby's own growth curve at scans.
- What trimester is 33 weeks?
- Week 33 is in the third trimester. The first trimester is weeks 1–13, the second is weeks 14–27, and the third is weeks 28 to birth (around week 40).