Question

the first heart sound of foetus can be heard in which week​

Answer 1

Answer:

A fetal heartbeat may first be detected by a vaginal ultrasound as early as 5 1/2 to 6 weeks after gestation. That's when a fetal pole, the first visible sign of a developing embryo, can sometimes be seen. But between 6 1/2 to 7 weeks after gestation, a heartbeat can be better assessed

Answer 2

Answer:

5 th week

Explanation:

in 5 th week we can hear the foetus's heart sound