Juneja, S. K., Tandon, P., Sharma, A., & Sharma, A. (2020). Sensitivity and specificity of prenatal screening methods for detection of risk of fetal chromosomal abnormalities. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 9(2), 540–544. https://doi.org/10.18203/2320-1770.ijrcog20200332