8[1]Kenneth P R.Y-Chromosome delelione and male Infertility:state of the art chnical imptieations[J].Androl,1998,19(3):225.
9[3]WHO.WHO Laboratory manual for the examination of human semen and sperm-cervical mucus interation[M].4th ed.London:Cam-bridge University Press,1999,5-24.