DOPAMINE / SCIENCE PHOTO LIBRARY DOPAMINE / SCIENCE PHOTO LIBRARY
Foetal hand at 12 weeks measuring around four millimetres in length. At this stage of development (end of the first trimester), the foetus measures about six centimetres in length from crown-to-rump (sitting position) and weighs about 20 grams. The foetus is able to move its arms and legs, although the mother is not usually able to feel this movement.
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