
Keywords: Beta-defensin; Epididymis; Sperm maturation; Flagellar motility pattern; Sperm-oocyte binding; iCre knock-inDefb, Beta-defensing; KI, Knock-in; AR, Androgen receptor; IVF, In vitro fertilization; PKA, Protein kinase A; SACY, Soluble adenylyl cyclase; ZP,