1. Fetal and perinatal mortality: United States, 2013;Marian;Natl. Vital,2015
2. WHEC Practice Bulletin and Clinical Management Guidelines for healthcare providers, Intrapartum Electronic Fetal Monitoring, Women's Health and Education Center (WHEC), 11 December 2009. Available: http://www.womenshealthsection.com/content/obs/obs028.php3.
3. Births: Final Data for 2012, National Vital Statistics Report;Ioyce,2013
4. Twenty- five years after the FIGO guidelines for the use of fetal monitoring: time for a simplified approach?;Ayres-de-Campos;Int. J. Gynecol. Obstet.,2010
5. Electronic fetal heart rate monitoring: applying principles of patient safety;David;Am. J. Obstet. Gynecol.,2012