Week 33 of pregnancy
Week 33 is in the last stretch. Much of what's left for the baby is maturing and putting on weight.
How the baby is getting ready
The brain and nervous system are fully developed. The bones are hardening, but the skull stays soft for birth. [1]
How your body may feel
Your bump may tighten for 20 to 30 seconds and then relax. These are Braxton Hicks, practice contractions. Call your midwife if they hurt or come regularly. [1]
Everyone's pregnancy is different. If something worries you, call your midwife or doctor.
Worth doing now
Pack your hospital bag now, in case the baby comes early. Only 1 in 20 babies arrive on their due date. [1]
Questions you could bring to your next appointment
- What should I do if the baby's movements change?
- Which signs mean it's time to call or come in?
- Can we go through my birth preferences?
Questions
What if the baby's movements change?
The NHS says to call your midwife or maternity unit straight away if the baby is moving less than usual or the pattern changes. Don't wait until the next day, even in the middle of the night.
Do movements slow down near the end?
They shouldn't. The NHS says you should feel your baby move right up to and during labor. There's no set number of kicks to count: get to know your baby's usual pattern.
Is my baby exactly this size?
Probably not exactly. The length is the average the NHS gives for this week, and the weight is the middle value (50th percentile) of the WHO fetal growth charts. Your scan results are the ones that count.
Sources
- NHS: 33 weeks pregnant guide Checked October 30, 2026
- NHS: Your baby's movements Checked October 30, 2026
- WHO: The World Health Organization fetal growth charts (Kiserud et al., PLoS Medicine 2017), table 11: estimated fetal weight Checked October 30, 2026
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