During embryonic development of human, limbs, and digits are formed during

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At the end of the 1 st month The heart is formed (Listening of heart sound by stethoscope is the first sign of growing foetus) At the end of the 2 nd month Limbs and digits are formed At the end of 1 st trimester Formation of major organ systems e.g. limbs and external genitalia. In 5 th month First movements and appearance of hair on the head. At the end of 2 nd trimester The body is covered with fine hairs. Eyelids separate and eyelashes are developed.

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At the end of the 1^st month	The heart is formed (Listening of heart sound by stethoscope is the first sign of growing foetus)
At the end of the 2^ndmonth	Limbs and digits are formed
At the end of 1^st trimester	Formation of major organ systems e.g. limbs and external genitalia.
In 5^th month	First movements and appearance of hair on the head.
At the end of 2^nd trimester	The body is covered with fine hairs. Eyelids separate and eyelashes are developed.