Infertility treatment, a matter of a lovely sperm

Nowadays, the efficiency of the infertil-ity treatment is relatively low. One of the cues to counteract this problem relies on the optimum selection of spermatozoa. We developed a new method （sperm selection assay （SSA）） based on the chemical attrac-tion of spermatozoa that are at the best functional state. Additionally, the SSA leads spermatozoa to complete and/or acquire the competence to fertilize the egg. These effects are equally observed either in nor-mal or subfertile semen samples. Those cap-abilities of SSA may improve the success of current infertility treatment.