Juneja, Sunil Kumar, Pooja Tandon, Anjali Sharma, and Anshu Sharma. “Sensitivity and Specificity of Prenatal Screening Methods for Detection of Risk of Fetal Chromosomal Abnormalities”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9, no. 2 (January 28, 2020): 540–544. Accessed October 30, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/6999.