Aminu, M. B., M. Alkali, B. M. Audu, and T. Abdulrazak. “Gastrointestinal Symptoms in Pregnancy Among Antenatal Clinic Attendees in Abubakar Tafawa Balewa University Teaching Hospital Bauchi, Northeast Nigeria”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 9, no. 3, Feb. 2020, pp. 1029-33, doi:10.18203/2320-1770.ijrcog20200869.