Aminu, M. B.; Alkali, M.; Audu, B. M.; Abdulrazak, T.; Bathna, D. Prevalence of Hyperemesis Gravidarum and Associated Risk Factors Among Pregnant Women in a Tertiary Health Facility in Northeast, Nigeria. Int J Reprod Contracept Obstet Gynecol 2020, 9, 3557-3562.