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25 to 28 weeks pregnant

Week 25 of pregnancy

Your baby is moving about and responds to touch and sound. A loud noise may make them jump and kick. This is called the 'startle response'. You can feel this. They may respond to your voice with movement. Talk and sing to them and encourage your partner to do the same.

Your baby's movements during pregnancy

At this stage, your baby is peeing into the amniotic fluid. Sometimes they may get hiccups and you can feel the jerk of each hiccup.

Their eyelids open for the first time and they will soon start blinking. It is not until some weeks after the birth that your baby's eyes become the colour they will stay.

Your baby's heart rate is around 140 beats per minute. This is still much faster than your own heart rate.

The baby has grown to about 340mm long and is about the size of a courgette.

Week 26 of pregnancy

At 26 weeks, your baby is around 35cm to 36cm long. This is about the length of a cucumber. Their lungs are producing an important substance called surfactant. It helps the air sacs of their lungs to expand and deflate during breathing.

Their brain, lungs and digestive system are in place. But these are still developing.

Weeks 27 and 28 of pregnancy

Week 27 is the last week of the second trimester. Your baby weighs around 1kg.

Your doctor or midwife can hear your baby's heartbeat using a special stethoscope.

Your baby continues to put on weight and more fat appears under the skin. This makes their skin appear smoother and less wrinkled.

Week 28 marks the start of the third trimester.

At 28 weeks of pregnancy, the baby has grown to about 370mm long and is about the size of an aubergine.

Page last reviewed: 3 December 2025
Next review due: 3 December 2028

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This project has received funding from the Government of Ireland’s Sláintecare Integration Fund 2019 under Grant Agreement Number 8.