๋ณด๋ค
์ด๋ฒคํธ
๋ธ๋ก๊ทธ
ํ์ด์ง
๋
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
๋ ๋ก๋
ํญ๋ชฉ์ ๊ตฌ๋งคํ๋ ค๊ณ ํฉ๋๋ค. ๊ณ์ํ์๊ฒ ์ต๋๊น?