Bakhtawar , Khadija, Akash John, Abid Ali, and Maryam Mubbarka. “Ultrasound Diagnosis and Risk Factors of 1st Trimester Complications in Pregnancy: Ultrasound Diagnosis and Risk Factors of 1st Trimester”. Pakistan BioMedical Journal 5, no. 4 (April 30, 2022): 41–45. Accessed March 29, 2024. https://pakistanbmj.com/journal/index.php/pbmj/article/view/293.