Swathy, K. J., K. Shankar, Y. Asokan, G. V., R. G. V., N. M. Naaram, and H. N. K. R. “Serum Progesterone Level As a Predictor of Pregnancy in Frozen Embryo Transfer”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 14, no. 2, Jan. 2025, pp. 450-3, doi:10.18203/2320-1770.ijrcog20250025.