Abeydeera LR, Day BN. 1997.
In vitro penetration of pig oocytes in a modified Tris-buffered medium: Effect of BSA, caffeine and calcium. Theriogenology 48:537–544.
Aitken RJ, Kerr L, Bolton V, Hargreave T. 1990. Analysis of sperm function in globozoospermia: implications for the mechanism of sperm-zona interaction. Fertil Steril 54:701–707.
Amann RP. 1989. Can the fertility potential of a seminal sample be predicted accurately? J Androl 10:89–98.
Bavister BD, Leibfried ML, Lieberman G. 1983. Development of preimplantation embryos of the golden hamster in a defined culture medium. Biol Reprod 28:235–247.
Blasco L. 1984. Clinical tests of sperm fertilizing ability. Fertil Steril 41:177–192.
Bostofte E, Serup J, Rebbe H. 1984. Interrelations among the characteristics of human semen, and a new system for classification of male infertility. Fertil Steril 41:95–102.
Chenoweth PJ. 2005. Genetic sperm defects. Theriogenology 64:457–468.
Correa JR, Zavos PM. 1994. The hypoosmotic swelling test: Its employment as an assay to evaluate the functional integrity of the frozen-thawed bovine sperm membrane. Theriogenology 42:351–360.
Flowers WL. 1997. Management of boars for efficient semen production. J. Reprod. Fertil Suppl 52:67–78.
Foldesy RG, Vanderhoof MM, Hahn DW. 1986. Lack of correlation between fertility and sperm numbers in male rats treated with histrelin, a potent LHRH agonist. J Androl 7:140–146.
Gil MA, Ruiz M, Vazquez JM, Roca J, Day BN, Martinez EA. 2004. Effect of short periods of sperm-oocyte coincubation during
in vitro fertilization on embryo development in pigs. Theriogenology 62:544–552.
Glass RH, Ericsson RJ. 1979. Spontaneous cure of male infertility. Fertil Steril 31:305–308.
Hoing LM, Devroey P, Van Steirteghem AC. 1986. Treatment of infertility because of oligoasthenoteratospermia by transcervical intrauterine insemination of motile spermatozoa. Fertil Steril 45:388–391.
Ha WT, Lee WY, Lee R, Kim JH, Kim NH, Kim JH, Lee IJ, Song H. 2013. Effect of naturally derived substances on motion parameters of
in vitro non-freezing preserved pig sperm. Reprod Dev Biol 37:9–16.
Hurtgen JP, Johnson LA. 1982. Fertility of stallions with abnormalities of the sperm acrosome. J. Reprod. Fertil Suppl 32:15–20.
Ivanova M, Mollova M. 1993. Zona-penetration
in vitro test for evaluating boar sperm fertility. Theriogenology 40:397–410.
Lavara R, Moce E, Lavara F, Viudes de Castro MP, Vicente JS. 2005. Do parameters of seminal quality correlate with the results of on-farm inseminations in rabbits? Theriogenology 64:1130–1141.
Moretti E, Collodel G, Scapigliati G, Cosci I, Sartini B, Baccetti B. 2005. ‘Round head’ sperm defect. Ultrastructural and meiotic segregation study. J Submicrosc Cytol Pathol 37:297–303.
Nicander L, Bane A. 1966. Fine structure of the sperm head in some mammals, with particular reference to the acrosome and the subacrosomal substance. Z Zellforsch Mikrosk Anat 72:496–515.
Quintero-Moreno A, Rigau T, Rodriguez-Gil JE. 2007. Multivariate cluster analysis regression procedures as tools to identify motile sperm subpopulations in rabbit semen and to predict semen fertility and litter size. Reprod Domest Anim 42:312–319.
Robinson JA, Buhr MM. 2005. Impact of genetic selection on management of boar replacement. Theriogenology 63:668–678.
Saacke RG. 1983. Semen quality in relation to semen preservation. J Dairy Sci 66:2635–2644.
Saacke RG. 1990. What is abnormal? And is abnormal dependent upon the animal. In : Proceeding of the NAAB 13th Technical Conference on AI and Reprod; Milwaukee, WI, USA. p. 67–73.
Santos NR, Krekeler N, Schramme-Jossen A, Volkmann DH. 2006. The knobbed acrosome defect in four closely related dogs. Theriogenology 66:1626–1628.
Soderquist L. 1998. Reduced fertility after artificial insemination in a ram with a high incidence of knobbed acrosomes. Vet Rec 143:227–228.
Toyama Y, Itoh Y. 1993. Ultrastructural features and pathogenesis of knobbed spermatozoa in a boar. Am J Vet Res 54:743–749.
World Health Organization. 1992. WHO Labboratory manual for the Examination of human semen and semen-cervical mucus interaction. Cambridge University Press; New York, NY, USA:
Yoshioka K, Suzuki C, Tanaka A, Anas IM, Iwamura S. 2002. Birth of piglets derived from porcine zygotes cultured in a chemically defined medium. Biol Reprod 66:112–119.