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Third trimester

Week 38 of pregnancy

Your baby is the size of a leek. The organs are ready for life outside the womb and the fine hair has almost all gone.

Your baby is the size of a leek

Length, head to heel
≈ 49.8 cm
Weight
≈ 3.1 kg

Your baby this week

  • The organs are ready to work on their own after birth.
  • Lanugo has almost all gone.
  • Meconium has collected in the gut and will be the first poo.

Your body this week

  • Swelling and pressure in your pelvis are common.
  • Signs that labour is starting include regular contractions that get stronger, backache, the mucus plug coming away and your waters breaking.
  • Many women feel impatient and tired in these days.

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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.