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Third trimester

Week 37 of pregnancy

Your baby is the size of a bunch of chard. From week 37 the pregnancy is called full term: the baby is practising sucking, gripping and breathing.

Your baby is the size of a bunch of chard

Length, head to heel
≈ 48.6 cm
Weight
≈ 2.9 kg

Your baby this week

  • From this week the pregnancy is called full term.
  • The baby practises sucking, gripping and breathing.
  • The extra fat helps it keep warm after birth.

Your body this week

  • The mucus plug may come away from your cervix, a sign your body is getting ready, though labour may start days or weeks later.
  • Braxton Hicks contractions may get more frequent.
  • Sleep may be broken by the size of your bump and thoughts about the birth.

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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.