S. Aghara, S. Rankja, J. Joshi, D. Rankja, and D. Rankja, “Sequential first and second trimester ultrasound screening for early detection of fetal anomalies: a prospective observational study”, Int J Reprod Contracept Obstet Gynecol, vol. 15, no. 6, pp. 2014–2018, May 2026.