TY  - GEN
AU  - Pystynen,P
AU  - Ylöstalo,P
AU  - Ojala,A
TI  - Detection of foetal heart action by ultrasound transformed into audible signals. A comparative study with visual method
SN  - 0003-3855
PY  - 1969///0902
KW  - Biomedical Engineering
KW  - Female
KW  - Fetal Heart
KW  - Gestational Age
KW  - Humans
KW  - Methods
KW  - Pregnancy
KW  - Pregnancy Complications
KW  - diagnosis
KW  - Time Factors
KW  - Ultrasonics
KW  - instrumentation
KW  - Ultrasonography
N1  - Publication Type: Comparative Study; Journal Article
ER  -