Apiwantana, S., Sooklim, R., Manusirivithaya, S., & Phaloprakarn, C. (2013). Effect of Gestational Weight Gain on Pregnancy Outcomes in Underweight Pregnant Women. Thai Journal of Obstetrics and Gynaecology, 21(3), 124–121. retrieved from https://he02.tci-thaijo.org/index.php/tjog/article/view/11477