title: Study of chromosomes in the newborn after ultrasonic fetal heart monitoring in labour.
abstract: The effect of continuous-wave ultrasound on the chromosomes of newborn infants has been investigated. Twenty-four women were studied during labour. The fetal heart was monitored by a Sonicaid FM2 monitor applied to the abdomen, and continuous monitoring undertaken for intervals varying from 1 hour 5 minutes to 9 hours 25 minutes. There was no increase in the number of chromosome aberrations in cultures of blood taken from the insonated babies when compared with controls.
mesh_terms: D002869:Chromosome Aberrations; D046508:Culture Techniques; D005260:Female; D005318:Fetal Heart; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D007962:Leukocytes / Q000166:cytology; D011247:Pregnancy; D014465:Ultrasonics / Q000009:adverse effects*; D014463:Ultrasonography