Jeddi, Somayeh Zeynizadeh, Noushin Mobaraki, and Akbar Pirzadeh. 2020. “Transvaginal Ultrasound Compared With Serum β-HCG Level for Diagnosis of Ectopic Pregnancy in Symptomatic Patients”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9 (3):1228-33. https://doi.org/10.18203/2320-1770.ijrcog20200905.