Johnson, T R Significance of the sinusoidal fetal heart rate pattern. [electronic resource] - American journal of obstetrics and gynecology Feb 1981 - 446-53 p. digital Publication Type: Journal Article ISSN: 0002-9378 Standard No.: 10.1016/0002-9378(81)90323-9 doi Subjects--Topical Terms: Analgesics--pharmacologyElectrocardiographyFemaleFetal Distress--physiopathologyFetal Heart--drug effectsHeart RateHumansInfant, NewbornPregnancy