Bump Watch @ the BBC - Days 57 to 63

The foetal sac is now the size of a hen's egg. The foetus inside is three centimetres long - the size of a jelly baby! Some of the chorionic villi will now disappear, leaving others to grow and become the placenta. Eyes and ears develop rapidly at this time, and the beginnings of the skeleton are present. Your baby's heart has four chambers and beats twice as fast as yours. Muscles are developing so a scan would now show real movement. Amazing.