Week 9 of pregnancy
The head is still large and the chin has not developed yet. The face is slowly forming. The eyes are bigger and more obvious, and they have some colour (pigment) in them. There's a mouth and a tongue with taste buds.
The hands and feet are developing. Ridges identify where the fingers and toes will be - they won't have separated out yet. The major internal organs continue to develop - these include the heart, brain, lungs, kidneys and gut.
At 9 weeks of pregnancy, the embryo has grown to about 22mm long and is about the size of a grape.
Week 10 of pregnancy
The ears are starting to develop on the sides of the head. The ear canals are forming inside the head.
The upper lip and two tiny nostrils in the nose have developed by now. The jawbones are developing and already contain all the milk teeth.
The heart is now fully formed. It beats 180 times a minute - that's two to three times faster than your own heart.
The elbows can now bend - they are probably making small movements that you can see on an ultrasound scan. You probably won't be able to feel these movements yet.
Fingers and toes are becoming more defined.
Week 11 of pregnancy
The bones of the face are formed now. The eyelids are closed and won't open for a few months yet.
The ear buds developing on the sides of the head look more like ears as they grow.
The head makes up one-third of the body's length. The body is growing fast - it's straightening and the fingers and toes are separating. Fingernails have developed at this stage.
The placenta (afterbirth) is rapidly developing.
Week 12 of pregnancy
All the organs, muscles, limbs and bones are in place, and the sex organs are well developed.
It's too early for you to be able to feel movements yet, although they will be moving quite a bit.
The skeleton is made of tissue called cartilage. Around now, this cartilage starts to develop into hard bone.
They can suck their thumb now. They're about 61 mm long now - roughly the same size as a plum.