The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _________.
The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _________.
- A
By the end of the second month of pregnancy
- B
By the end of first trimester
- C
After one month of pregnancy
- D
During fifth month
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