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8. [Fetal movement patterns in the external cardiotocography and their interpretation by simultaneous ultrasound observation]. Prenzlau P, Bayer H, Hoffmann H. Zentralbl Gynakol; 1983 Oct; 105(15):972-6. PubMed ID: 6624300 [Abstract] [Full Text] [Related]
10. [Comparative evaluation of the TM and Doppler methods in detecting fetal cardiac activity in the I trimester of pregnancy]. Stygar AM. Vopr Okhr Materin Det; 1980 Aug; 25(8):64-6. PubMed ID: 7415041 [No Abstract] [Full Text] [Related]