NEIL BROMHALL / SCIENCE PHOTO LIBRARY NEIL BROMHALL / SCIENCE PHOTO LIBRARY
Five month old foetus. View of a five month (20 week) old male foetus holding his hand over his mouth. By this time the foetus appears completely human, with fully developed lips, eyelids, eyebrows, external ears, fingers and toes. There is not much subcutaneous fat on the limbs or face, and the weight of the foetus by the end of the 5th month is still less than 500 grams. Fine hair called lanugo has developed, and the head, still disproportionately large, grows more slowly than the body. Foetal movements can now usually be felt by the mother. This foetus has a crown-rump length of about 19 cm.
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