Human foetus in the womb. Computer artwork of a 18-week-old (gestational age) human foetus in the womb. The foetus is surrounded by amniotic fluid contained within the amniotic sac and is connected by the umbilical cord (lower right) to its mother's placenta (not seen) on the uterus wall. A human foetus takes around nine months to develop from an embryo to a fully-formed human baby.
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