1.

The human pregnancy lasts for nine month . Mention the features of embryonic development at various months of pregnancy

Answer»

In EMBRYONIC DEVELOPMENT
one month= heart is formed.the first sign of growing feotus may be noticed by listening to the heart sound.

Second month = the foetus develops limbs and digits.

Third month (first trimester / 12weeks)= most of the major organ are formed . the limbs and external genitalia organ are well developed.

Fifth month= the first MOVEMENT of foetus.
appearance of HAI on head are usually observed.

24 weeks ( end of second trimester )= the body is covered with fine hair, eyelids separate and eye lashes are formed.


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