4Palermo G, Joris H, Deveroey P, et al. Pregnancies after intracytoplasmic sperm injection of single spermatozoon into an occyte. Lancet, 1992, 340: 17-18.
5Belker A M, Sherins R J, Dennison-Lagos L, et al. Perculaneous testicular sperm aspiration: a convenient and effective office procedure to retrieve sperm for in vitro fertilization with introcytoplasmic sperm injection. J Urol, 1998, 160: 2058-2062.
6Palermo G, Schlegel PN, Colomdero LT, et al. Aggressive immobilization prior to Intracytoplasmic sperm injection with immature spermatozoa improves fertilization and pregnant rate. J Hum. Reprod, 1996, 11: 1023-1029.
7Aytoz A, Camus M, Tournaye H, et al. Outcome of pregnancy intracyoplasmic sperm injection and the effect of sperm quality on this outcome. J Fertil Steril, 1998, 70: 500-504.
8Mansour RT, Kamal A, Fahmy I. Intracytoplasmic Sperm obstructive and non-obstructive azoospermia. J Hum Reprod,1997, 12: 1974-1979.
