Interestingly, in a study screening a panel of 13mutations of CFTR in semen specimens from 127 CF-unrelated healthy males attendinginfertility clinics, fourteen (17.5%) of 80 healthy men with infertility dueto reduced sperm quality and two of 21 men (9.5%) with azoospermia carriedone CFTR mutation, while no CFTR mutation was detected in 26 males who hadnormozoospermia [13]. The gene discussed is CFTR; the disease is cystic fibrosis.