Czajka, "Clinical outcomes of high-risk labours monitored using fetal electrocardiography
," Annals of the Academy of Medicine Singapore, vol.
Symonds, Fetal Electrocardiography
, Imperial College Press, Londonm UK, 2001.
Fetal heart rate has been studied in the mare by many different techniques, including fetal electrocardiography
and ultrasonography (Kahn and Leidl, 1987.