since the lytic effect of boar and bull acrosin on the zona pellucida of ovarian oocytes and preimplantation embryos is not different from that on ovulated oocytes it can be assumed that neither the maturation of the zona pellucida during oogenesis nor its modification after fertilization , change the susceptibility of the zona pellucida to acrosin digestion .
C0029045
oocytes
C0043519
zona