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Pregnancy week by week

29 weeks pregnant

Your baby is getting plumper.

In short

At 29 weeks your baby is about the size of a small pineapple, around 39.2 cm long and 1.35 kg. Your baby is getting plumper.

  • Third trimester, week 29 of about 40.
  • Give your employer written notice at least 4 weeks before your maternity leave starts, along with a medical certificate confirming your pregnancy.
About the size ofSmall pineapple
Length, head to heel39.2 cm
Typical weight1.35 kg

Your baby's sucking reflex is developing and they may suck a thumb or fingers. Their skin is getting plumper and smoother.

How big is my baby at 29 weeks?

At 29 weeks your baby is about the size of a small pineapple, around 39.2 cm long and 1.35 kg. Before about 14 weeks babies are measured from crown to rump; after that the figure is head to heel. These are typical figures from fetal growth charts. Your own baby may be bigger or smaller, and your scans are what count.

What is my baby doing at 29 weeks?

What changes for me at 29 weeks pregnant?

What is a good tip for this week?

Rest during the day when you can and let the small jobs wait.

What can a partner do this week?

Take on the late-night and early-morning jobs so they can grab extra rest.

What should I know in Ireland at 29 weeks?

When to get help: There's no set number of movements to feel, but if your baby's usual pattern changes, contact your midwife or maternity unit immediately. HSE: when to get help.

Want these updates on your phone? The Lullagram app has a free pregnancy section with this week-by-week guide, Irish dates worked out from your due date, a contraction timer and more. When your baby arrives, the baby tracker is ready in the same app.

Sources and guidance

This page is written to be consistent with the official guidance below. It is general information for parents in Ireland, not medical advice. Links checked 23 September 2026.