1Keel BA. Quality control, quality assurance, and proficiency testing in the andrology laboratory [J] . Arch Androl, 2002, 48 (6): 417.
2Keel BA. How reliable are results from the semen analysis [ J ] . Fertil Steril, 2004, 82 (1): 41.
3Clemenls S, Cooper ID, Barratt CL Implementing comprehensive quality control in the andrology laboratory [ J] . Hum Reprod, 1995, 10 (8): 2096.
4Ombelet W, Pullet H, Bosmans E et al. Results of a questionnaire on sperm morphology assessment [J]. Hum Reprod,1997,12 ( 5 ) : 1015.
5Practice Committee of the American Society for Reproductive Medicine. Revised guidelines for human embryology and andrology laboratories [J] . Fertil Steril, 2006, 86 (5 Suppl) : S57.
7Mahmoud AM, Depoorter B, Piens Net al. The performance of 10 different methods for the estimation of sperm concentration [ J ] . Fertil Steril, 1997, 68 (2): 340.
8Lu JC, Chert F, Xu HR et al. Comparison of three sperm - counting methods for the determination of sperm concentration in human semen and sperm suspensions [J] . Lab Med, 2007, 38 (4) : 232.
9Johnson JE, Boone WR, Blaekhumt DW. Manual versus computer - automated semen analyses. Part II. Determination of the working range of a computer- automated semen analyzer [J] . Fertil Steril, 1996, 65 (1): 156.
9World health organization.WHO laboratory manual for the examination of human semen and sperm-cervical mucus interaction(4th editon).Cambridge University Press,1999:4-6,36-50
10Gerris J.Methods of'semen collection not based on masturbation or surgical sperm retrieval.Hum Reprod Update 1999;5(3):211-215
10Patrick J. Rowe. WHO manual for the standardized investigation, diagnosis and management of the infertile male, 1, Cambrige: Cambridge University Press, 2000:91.
