Parasnis, M. A., and U. K. Bandaru. “A Study of Correlation of Endometrial Morphology and Subendometrial Vascularity With Pregnancy Rate in Fresh and Frozen Embryo Transfer Cycles”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 11, no. 7, June 2022, pp. 1925-31, doi:10.18203/2320-1770.ijrcog20221671.