Suwannachat, Bunpode, and Prapatsorn Ualalitchoowong. “Maternal Age and Pregnancy Outcomes”. Srinagarind Medical Journal 22, no. 4 (November 11, 2013): 401–407. Accessed May 6, 2024. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13190.