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Third trimester

Week 29 of pregnancy

Your baby is the size of a butternut squash. The muscles and lungs are maturing and the bones are taking in lots of calcium.

Your baby is the size of a butternut squash

Length, head to heel
≈ 38.6 cm
Weight
≈ 1.2 kg

Your baby this week

  • The muscles and lungs keep maturing.
  • The head grows to make room for the brain, which is developing fast.
  • The bones take in a lot of calcium, so calcium-rich foods matter for you too.

Your body this week

  • Heartburn and constipation are common; small, frequent meals help.
  • You may get piles, from the pressure on the lower part of your body.
  • Braxton Hicks contractions may come more often.

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Read more for this stage

General information written by the mam.al editors. Every pregnancy is different and sizes are averages; it does not replace advice from your doctor or midwife. Sources include the NHS week-by-week guide to pregnancy. NHS. Contains public sector information licensed under the Open Government Licence v3.0.