6Pellestor F, Andreo B,Amal F, et al. Maternal aging and chromosomal abnormalities:new data drawn from in vitor unfertilized human oocytes [ J ]. Hum Genet, 2003,112 : 195-203.
7Nagy ZP, Staessen C, Liu J, et al. Prospective, auto-controlled study on reinsemination of failed-fertilized oocytes by intracytoplasmic sperm injection [ J ]. Fertil Steril, 1995,64 : 1130-1135.
9CHEN C, KARTRERA S. Rescue ICSI of oocytes that failed to extrude the second polar body 6h post-insemination in conventional IVF[J]. Hum Reprod,2003,18(10) :2122-2123.
10AMARIN Z O, OBEIDATBRTB R, ROUZIA A, etal. Intracyloplasmic sperm injection after total conventional in-vitro fertilization failure[J]. Saudi Med J,2005,26(3) :411-415.
1Francavilla S,Cordeschi G,Pelliccione F,et al.Isolated teratozoospermia: a cause of male sterility in the era of ICSI-2007.Frontiers in Bioscience 12:69-88.
2Rybouchkin AV,Vander Straeten F ,OuatackerJ, et al.Fertilization and pregnancy after assisted oocyte acti vation and intracytoplasmic sperm injection in case of round-headed sperm associated with deficient oocyte activation capacity.1997,Fertil Steril, 68:1144-1147.
3Liu DY, Baker HW G. Human sperm bound to the zone pellucida have normal nuclear chromatin assessed by A cridine orange flurescence []].Hum Ikeprod.2007,22:1597-1602.
4Henkel P,.,Franken DR,Habenicht UF. Zone pellucida as physiological trigger for the induction of acrosome reaction. Andrologia,1998,30:275-280.
5Miyara F, Aubriot FX ,Glissant A, et al. Multiparameter analysis of human oocytes at metaphase Ⅱ stage after IVF failure in non-male infertility. HumReprod,2003,18 ( 70 ): 1494-1503.
6Dirnfled M,Bider D,Korfman M, et al. Shortened exposure of oocytes to spermatozoa improve in-vitro fertilization outcome: a prospective randomized ,controlled study[J]. Hum Reprod, 1999,14(10):2562-2564.
7Chen C,Kattera S.Rescue ICSI of oocytes that failed to extrude the second Polar body 6h Post - in-semination in conventional IVF.Hum Reprod,2003,18 (10) :2118-2121.