title: Fetal breathing movements in uncomplicated pregnancies. I. Relationship to gestational age.
abstract: Fetal breathing movements occur in uncomplicated gestations. The relationship of fetal breathing movements recorded in 30 min sessions to gestational age and blood glucose levels is described. A total of 142 recording sessions were obtained from 45 gravid women with uncomplicated pregnancies from 24 to 41 weeks' gestation. There was a significant increase in the proportion of time spent in fetal breathing as gestational age increased. Glucose levels in a normal range (70 to 120 mg/100 ml) at the time of the recording sessions showed no correlation with the proportion of fetal breathing time.
mesh_terms: D000328:Adult; D005260:Female; D005323:Fetal Monitoring; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D008297:Male; D009068:Movement; D011247:Pregnancy; D012119:Respiration