For ejaculated and testicular specimen sources, fertilization patterns, embryo quality, together with implantation are provided for the control and each sperm search time.

Note: Values are presented as mean ± SD; tx = transferred; M = mean. aχ2 analysis of normal fertilization using ejaculated specimens according to increasing search time, P<0.0001. bχ2 analysis of normal fertilization using testicular specimens according to increasing search time, P<0.0001. cχ2 analysis of testicular cycles and decreasing 3PN formation with increasing search time, P<0.0001. dχ2 analysis of testicular cycles and increasing 1PN formation with increasing search time, P<0.0001. eχ2 analysis, implantation ability of zygotes generated from ejaculated samples, P = 0.028. A multivariable analysis and adjustment for covariates confirmed our initial findings. For ejaculated and testicular specimen sources, fertilization patterns, embryo quality, together with implantation are provided for the control and each sperm search time.