Mechanic injury had no considerable effects on hatching rate of embryos (73 39% vs 75 70%),but abnormal fries increased considerably (8 8% vs 0).

• 机械损伤对胚胎的孵化率无明显影响 (73 39%25vs 75 70%25 ) ,但对胚胎发育有明显的致畸作用 (8 0 6%25vs 0 )。