When does a foetus develop limbs and digits?

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Question

(B) According to human embryonic development,the heart is formed first,which can be heard via a stethoscope by the end of the first month. By the end

Vedclass · Accepted Answer

By the end of the second month of pregnancy

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(B) According to human embryonic development,the heart is formed first,which can be heard via a stethoscope by the end of the first month. By the end of the second month of pregnancy,the foetus develops limbs and digits. By the end of $12$ weeks (first trimester),most of the major organ systems are formed. Therefore,the correct answer is by the end of the second month of pregnancy.

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