28-week fetus - Image courtesy of BabybondWant to see a bigger pic?Your baby is now around 40 centimetres long and weighs around 1.15 kilogrammes, or 2.5lbs. His eyes can move around in their sockets and he may begin to react to light shone directly

. Did you miss out on what was happening to your baby last week? Take a look at fetal development - week 27. Your baby now weighs around 900 grams or 2lbs. She is probably now at the peak of her activity, before the space she has to play in begins

26-week fetus - Image courtesy of BabybondWant to see a bigger pic?Your baby is now nearly 40 centimetres long and weighs about 900g, nearly 2lbs. Her lungs are continuing their rapid development and your baby is practising breathing - inhaling

25-week fetus - Image courtesy of BabybondWant to see a bigger pic?Your baby is gaining weight fast and now weighs in at around 750g, around 1.6lbs, measuring around 35 centimetres. Spinal growth and strengthening is continuing this week. His lungs

20-week fetus - Image courtesy of BabybondWant to see a bigger pic?Your baby is now around 19 centimetres long and weighs about 300 grammes, around 0.6lbs. Her heartbeat is much stronger now and you may be able to feel it yourself if you lie quietly

Image of 19-week fetus courtesy of BabybondWant to see a bigger pic?By the end of this week you'll be half-way though your pregnancy! Your baby is now 17-18 centimetres long and weighs about 280 grammes, over half a pound. Things are about to slow

Image of 18-week fetus courtesy of BabybondWant to see a bigger pic?Your baby is now over 15 centimetres crown to rump and weighs 225-250 grammes, around half a pound. The nerves and spinal cord are now being coated with a fatty matter called myelin

Image of 16-week fetus courtesy of BabybondWant to see a bigger pic?Your baby is now almost 13 centimetres long and is about the size of a pear. He’s now going through another phase of rapid growth, both becoming longer and beginning to form adipose

Your baby has been moving around in her sac for many weeks now but exciting times are on the way as many women feel their child's movements for the first time between this week and week 20. This is called 'quickening' and usually starts with light

At the start of week 15 your baby is about 10 centimetres long and weighs around 50 grammes. Around about now your baby hears his first sounds and will listen to the sounds of your body, your heartbeat and digestion, and even your voice from here