at what stage embryo is called foetus
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The distinction between embryo and fetus is made based on gestational age. An embryo is the early stage of human development in which organs are critical body structures are formed. An embryo is termed a fetus beginning in the 11th week of pregnancy, which is the 9th week of development after fertilization of the egg.
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Answer:
when the embryo crosses 32 celled stage and after the 1st trimester
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