Pregnancy Week By Week

20 Weeks Pregnant: Development, Symptoms and Care

At 20 weeks pregnant, you are around the halfway point of a typical 40-week pregnancy. That is a useful marker, not a prediction of the day your baby will arrive. You may have an anatomy scan around now, notice more movement or need new ways to get comfortable.

Your baby’s development at 20 weeks

Your baby’s muscles are growing, they are moving around in the uterus, and their fingerprints have formed. The way you notice movement is individual; a developmental milestone on a page does not tell you how strong a kick should feel.

Body changes and comfort

Your hips may ache, particularly in bed. A pillow between your knees or beside your body may make resting more comfortable. Tell your care team if pain is interfering with sleep, walking or everyday tasks.

Some people notice breathlessness during pregnancy, but new or worsening breathing difficulty needs medical advice straight away. Call 000 for severe difficulty breathing, chest pain or collapse. Do not explain these symptoms away as the baby taking up room.

Movement at 20 weeks

First movements are usually felt between 16 and 24 weeks, so 20 weeks is not a deadline for a particular pattern. There is no universal daily kick target.

Contact your maternity team immediately for reduced or concerningly changed movement; do not wait overnight. If you cannot reach them, attend the nearest hospital maternity or emergency unit. If you have never felt movement by 24 weeks, tell your care team. A home Doppler cannot replace an assessment.

Your anatomy scan and results

The morphology ultrasound is commonly offered between 18 and 22 weeks to assess anatomy and the placenta. It cannot rule out every health condition. If something needs another look, ask what is known, what remains uncertain and when the next assessment should happen.

You may be offered an additional scan to obtain views that were not clear enough, or further tests for a specific finding. Ask why follow-up is recommended rather than assuming either that everything is wrong or that it is unnecessary. You can read more in our prenatal tests guide.

Care from this point

Keep your antenatal appointments even when you feel well. Pre-eclampsia usually develops after 20 weeks and may initially have no noticeable symptoms, which is one reason blood pressure checks matter. Severe headache, blurred vision, sudden swelling of the face or hands, or pain beneath the ribs needs urgent assessment.

In Australia, a whooping cough vaccine is recommended in each pregnancy, ideally between 20 and 32 weeks. Ask your midwife, GP or vaccination provider about timing for you. If birth may happen early or you have already had a dose this pregnancy, discuss that history rather than arranging another dose yourself.

If you want antenatal classes, check availability now. Choose something that gives you room for questions about labour, feeding and the early weeks at home, rather than feeling you need to learn everything at once.

When to seek medical help

In Australia, call 000 for heavy bleeding, severe abdominal pain, severe breathing difficulty, chest pain or collapse. Do not drive yourself if faint or very unwell.

Contact your GP, midwife or hospital immediately for vaginal bleeding, leaking fluid, fever, vomiting that prevents drinking, persistent or worsening pain, or concerning contractions. Severe headache, blurred vision, sudden swelling or pain under your ribs also needs urgent assessment. If your usual team is unavailable, seek urgent care rather than waiting for an appointment.