ALEXANDER TSIARAS / SCIENCE PHOTO LIBRARY. ALEXANDER TSIARAS / SCIENCE PHOTO LIBRARY.
Endoscopic image of the human foetus in vivo , after 8 weeks, showing the head(top) and hand. At this time the foetus is about 1 inch long, with half of this distance being taken up by the head. Here facial feature development is imminent, and the lower jaw is developing rapidly. The retina of the eye (dark spot), & the cartilage that forms the nose are also visible. The endoscope, a series of lenses and a fibre-optic light source, is inserted through the cervix (the neck of the womb) and manipulated until a "window" into the amniotic sac is found (ie an area where the wall is thinner).
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