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Human Reproduction

Embryo’s heart s developed during
A. Fourth trimester
B. Third trimester
C. Second trimester
D. First trimester

D. First trimester

After one month of pregnancy, the embryo's heart is formed.
By the end of second month of pregnancy, the foetus develops limbs and digits.
By the end of third month, most of the organ systems are formed.
Appearance of hair on the head and foetus movement is observed during fifth month.
After six months, the body is covered with fine hair, eye-lids separate and eyelashes are also formed.
By the end of nine months of pregnancy, the foetus is completely developed and is ready for its delivery.

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