NEIL BROMHALL / SCIENCE PHOTO LIBRARY NEIL BROMHALL / SCIENCE PHOTO LIBRARY
Foetal genitalia. View of the genitalia and legs of a 22 week old male foetus. The developing penis and scrotum can be seen. The umbilical cord (white), which carries oxygen and nutrients from the placenta, attaches to the foetus' abdomen at far left. By this time the foetus appears completely human, with fully developed lips, eyelids, eyebrows, external ears, fingers and toes. Fine head hair 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 weighs roughly 650 g and has a crown-rump length of about 21 cm.
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