Sukhopon, Weena, Watcharapot Anakrat, and Apichaya Pradyachaipimon. 2021. “The Prevalence of Preterm Delivery and Adverse Pregnancy Outcomes in Healthy Singleton Teenage Pregnancies at Charoenkrung Pracharak Hospital”. Thai Journal of Obstetrics and Gynaecology 29 (5). Bangkok, Thailand:298-304. https://doi.org/10.14456/tjog.2021.35.