4Osser S, Beckman-Ramirez A, Liedholm P. Semen quality of smoking and non-smoking men in infertile couples in a Swedish population. Acta Obstet Gynecol Scand 1992; 71(3): 215-218
5Jensen TK, Andersson AM, Jorgensen N, et al. Body mass index in relation to semen quality and reproductive hormones among 1,558 Danish men. Fertil Steril 2004; 82 (4): 863-870
6Kort HI, Massey JB, Eisner CW, et al. Impact of body mass index values on sperm quantity and quality. J Androl 2006;27(3): 450-452
7Cavalcante MB, Rocha Mde P, Dias ML, et al. Interference of age on semen quality [J]. Rev Bras Gynecol Obstet, 2008,30 (11) :561-565.
8Romero Ramos R, Romero Gutierrez G, Abortes Monroy I, et al. Risk factors associated to female infertility[J]. Gynecol Obstet Mex,2008,76(12) :717-721.
9Patrick J R, David G P. Sociocultural attitudes towards infertility and assisted reproduction in India [A]. In:Current Practices and Controversies in Assisted Reproduction[R]. Geneva: WHO. 2001: 60-74.
10Kim SW, Kim KD, Paick JS. Microdeletions within the azoospermia factor subregions of the Y chromosome in patients with idiopathic azoospermia[ J ]. Fertil steri, 1999,72 (2) : 319 - 353.
7Zhang Z, Sapiro R, Kapfhamer D, et al. A sperm-associated WD repeat protein orthologous to chlamydomonas PF20 associates with Spag6, the mammalian orthologue of chlamydomonas PF16. Mol Cell Biol, 2002, 22(22) : 7993-8004.
8Zhang Z, Kostetskii I, Moss SB, et al. Haploinsufficiency for the murine orthologue of Chlamydomonas PF20 disrupts spermatogen- esis. Prec Nail Acad Sci USA, 2004, 101(35) : 12946-12951.
9Zhang Z, Kostetskii I, Tang W, et al. Deficiency of SPAG16L causes male infertility associated with impaired sperm motility. Biol Reprod, 2006, 74(4) : 751-759.
10Zhang Z, Shen X, Jones BH, et al. Phosphorylation of mouse sperm axoneme central apparatus protein SPAG16L by a testis- specific kinase, TSSK2. Biol Reprod, 2008, 79( 1 ) : 75-83.
