Benson, R C Fetal heart rate as a predictor of fetal distress. A report from the collaborative project. [electronic resource] - Obstetrics and gynecology Aug 1968 - 259-66 p. digital Publication Type: Journal Article ISSN: 0029-7844 Subjects--Topical Terms: Anesthesia, ObstetricalBirth WeightComputersFemaleFetal DeathFetal Diseases--diagnosisFetal Heart--physiopathologyHeart AuscultationHeart RateHumansHypoxia--diagnosisInfant MortalityMethodsPregnancyProspective Studies