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Pregnancy at week 23

Your baby

Your baby is now covered in fine hair, called lanugo, which is getting darker and may be visible on an ultrasound scan. The hair on their head and their eyebrows is developing colour.

Their lungs have started to produce surfactant, a substance that helps their lungs to stay inflated when your baby is breathing air after birth. Your baby is practising to breathe in your uterus too, but they are still getting all their oxygen from the placenta.

Their brain and nervous system are developing rapidly. They can now recognise light, sound and pain. Their vision is improving, and they will know the sound of your heartbeat and voice. You might like to talk, sing or read to your baby.

Your body

Your growing uterus might be pressing down on your bladder, causing you to leak urine, especially when you cough, laugh or sneeze. This incontinence should be temporary and usually resolves after pregnancy. Either way it's important to strengthen your pelvic floor muscles by doing regular exercises. You should do these exercises every day throughout your pregnancy and continue after you have your baby.

Many women start to feel warm during the second trimester. This is because of the extra blood in your body. If it's summertime, you can stay cool by wearing loose cotton clothes. Keeping well hydrated is also especially important while you're pregnant.

You might also notice changes to your balance now as your centre of gravity shifts forward with your growing bump. Exercising your core muscles can help strengthen your abdominal muscles and back. You might want to try pregnancy yoga or Pilates. Talk to your doctor or midwife before starting any new exercise programs during pregnancy, just to be on the safe side.

Things to remember

The birth might seem like it's a long way off, but now is the time to start preparing for parenthood. Having a baby will change your life.

It's a good idea to talk to your partner or support person about who will be there to support you during the birth, who is going to take time off to look after the baby, and how you will share household chores and caring for other children in the first weeks and months.

You may also find it useful to think about what practical help you can ask for from family and friends, what services are available in your area, and how you can meet other parents to build a support network. Your doctor or midwife will be able to point you in the right direction to find out what's available too.

Resources and support

Speak to your doctor, midwife or obstetrician if you have questions about your pregnancy.

Pregnancy, Birth and Baby also has more information on:

Speak to a maternal child health nurse

Call Pregnancy, Birth and Baby to speak to a maternal child health nurse on 1800 882 436 or video call. Available 7am to midnight (AET), 7 days a week.

Last reviewed: August 2023