Pattraporn Udompornthanakij และ Kittipong Kongsomboon; Tharangrut Hanprasertpong. (2025) Effect of Face Mask Wearing on Maternal Oxygen Saturation and on Non-stress Test Results. <i>Thai Journal of Obstetrics and Gynaecology</i>, <i>33</i>(4), 304-314.Pattraporn Udompornthanakij และ Kittipong Kongsomboon; Tharangrut Hanprasertpong. "Effect of Face Mask Wearing on Maternal Oxygen Saturation and on Non-stress Test Results". Thai Journal of Obstetrics and Gynaecology 33 (2025):304-314.Pattraporn Udompornthanakij และ Kittipong Kongsomboon; Tharangrut Hanprasertpong. Effect of Face Mask Wearing on Maternal Oxygen Saturation and on Non-stress Test Results. PIMDEE Co. Ltd.:ม.ป.ท. 2025.