Homkrun, Panupun. “Day 4 beta-hCG changing for predict the response of methotrexate treatment in ectopic pregnancy”. Health Science Clinical Research 39, no. 1 (June 30, 2024): 60–67. accessed September 12, 2026. https://he02.tci-thaijo.org/index.php/hscr/article/view/267987.