A systematic review including 18 studies was abstracted in DARE.
Using a 5% threshold normal sperm morphology 10/10 studies showed a positive predictive value for normal sperm morphology in fertilisation with 9/10 reaching significance. 9/11 studies produced positive predictive values for prediction of pregnancy, with 2/10 reaching significance. The overall pregnancy rates were 15.2% per cycle for the <5% group and 26% for the >5% group.