ืฉืขืื
ืืืจืืขืื
ืืืื
ืืคืื
ืืืชืจ
Fetal heart sound๐ detection For the 1st time by ultrasound At 6th week of pregnancy๐คฐ At 12th week by fetal Doppler At 20th week by stethoscope
ืืขื ืขืื
ืืชื ืขืืื ืืจืืืฉ ืืช ืืคืจืืืื, ืืื ืืชื ืจืืฆื ืืืืฉืื?