Charernjiratragul, K., Klangsin, S., Wattanakumtornkul, S. and Soonthornpun, K. 2023. Vaginal Bleeding Patterns in Women with Heart Disease Who Used Contraceptive Implants in Songklanagarind Hospital . Thai Journal of Obstetrics and Gynaecology. 31, 1 (Jan. 2023), 72–81. DOI:https://doi.org/10.14456/tjog.2023.9.