The ears start to develop their final shape in week 22. By now, the baby's hearing is quite well developed and he will be able to hear sounds from outside the uterus.
If you sing the same song a lot to your baby now, he'll probably recognise it after birth and it could actually comfort him.
The layer of fat under the skin is gradually increasing, and your baby is looking more and more like a newborn baby. His skin is still a little wrinkly but this will improve as the weeks go by.
You are also accumulating more amniotic fluid. By the end of your pregnancy your womb will hold a litre of amniotic fluid!
The baby may often pinch the umbilical cord. That's nothing to worry about though, the vein and the two arteries in the umbilical cord are well protected. In fact, it takes quite some strength to cut the cord, as you´ll notice after the birth. By the time the baby is born the umbilical cord will be about as long as the baby.
Your child is asleep most of the time. After he is born, you´ll soon notice that your baby has a favourite sleeping position, which he is developing right now.
Slimming while you are pregnant is very unwise!
As the fat cells are broken down harmful substances are released which can reach your baby via your bloodstream. It's best to eat as healthily as possible, especially avoiding sweets and snacks. Make sure you drink plenty of water and eat lots of fruit and vegetables. You'll lose most of the weight you've gained when you give birth and often shed the remaining pounds easily enough within the first few months after that.