1. Cardiovascular system;Blackburn;Maternal, fetal, and neonatal physiology: A clinical perspective,(2018a)
2. Neurologic, muscular and sensory systems;Blackburn;Maternal, fetal, and neonatal physiology: A clinical perspective,(2018b)
3. Prenatal period and placental physiology;Blackburn;Maternal, fetal, and neonatal physiology: A clinical perspective,(2018c)
4. Placental gas exchange and the oxygen supply to the fetus;Carter;Comprehensive Physiology,(2015)
5. The autonomic nervous system and fetal heart rate variability;Dalton;American Journal of Obstetrics and Gynecology,(1983)