1. American College of Obstetricians and Gynecologists. ACOG practice bulletin. Intrapartum fetal heart monitoring no 70. Obstet Gynecol 2005; 106: 1653–60.
2. Births: final data for 2002;Martin;Natl Vital Stat Rep,2003
3. Anaes. Intérêt et indications des modes de surveillance du rythme cardiaque fœtal au cours de l’accouchement normal 2002. http://www.anaes.fr.
4. Numerical analysis of the human fetal heart rate: the quality of ultrasound records;Dawes;Am J Obstet Gynecol,1981
5. Handbook of fetal heart rate monitoring;Parer,1997