Boonchuan, Kanittha, Kanokwaroon Wattananirun, and Dittakarn Boriboonhirunsarn. 2018. “Incidence of Intrapartum Abnormal Fetal Heart Rate Pattern in Siriraj Hospital”. Thai Journal of Obstetrics and Gynaecology 26 (1). Bangkok, Thailand:18-26. https://doi.org/10.14456/tjog.2018.5.