Ultrasonic Doppler studies of the heart in the foetal guinea pig.
D000818:Animals; D004452:Echocardiography; D005260:Female; D005318:Fetal Heart; D006168:Guinea Pigs; D008722:Methods; D009991:Oscillometry; D011247:Pregnancy; D013637:Tape Recording; D014159:Transducers; D014465:Ultrasonics