Smith, A. D. A. C., Tilling, K., Lawlor, D. A., & Nelson, S. M. (2015). External validation and calibration of IVFpredict:A national prospective cohort study of 130,960 in vitro fertilisation Cycles. PLoS ONE, 10(4), Article e0121357. https://doi.org/10.1371/journal.pone.0121357