Na Nan, Chatchanawadee, Srisuda Songthamwat, Ueamporn Summart, and Metha Songthamwat. 2022. “Complications of Advanced Maternal Age Pregnancy: A Retrospective Cohort Study”. Srinagarind Medical Journal 37 (3):197-205. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/254142.