Aisen, EG; Medina, VH and Venturino, A (2002). Cryopreservation and post-thawed fertility of ram semen frozen in different trehalose concentrations. Theriogenology. 57: 1801-1808.
Alcay, S; Toker, MB; Gokce, E; Ustuner, B; Onder, NT; Sagirkaya, H and Soylu, MK (2015). Successful ram semen cryopreservation with lyophilized egg yolk-based extender. Cryobiology. 71: 329-333.
Amirat, L; Tainturier, D; Jeanneau, L; Thorin, C; Gérard, O; Courtens, JL and Anton, M (2004). Bull semen in vitro fertility after cryopreservation using egg yolk LDL: a comparison with Optidyl®, a commercial egg yolk extender. Theriogenology. 61: 895-907.
Ansari, MS; Rakha, BA; Akhter, S and Ashiq, M (2016). OPTIXcell improves the postthaw quality and fertility of buffalo bull sperm. Theriogenology. 85: 528-532.
Arando, A; Gonzalez, A; Delgado, JV; Arrebola, FA and Perez-Marín, CC (2017). Storage temperature and sucrose concentrations affect ram sperm quality after vitrification. Anim. Reprod. Sci., 181: 175-185.
Asadpour, R; Jafari, R and Tayefi-Nasrabadi, H (2012). The effect of antioxidant supplementation in semen extenders on semen quality and lipid peroxidation of chilled bull spermatozoa. Iran. J. Vet. Res., 13: 246-249.
Belala, R; Briand-Amirat, L; Vinciguerra, L; Tainturier, D; Kaidi, R; Thorin, C and Bencharif, D (2016). Effect of equilibration time on the motility and functional integrity of canine spermatozoa frozen in three different extenders. Res. Vet. Sci., 106: 66-73.
Cerolini, S; Maldjian, A; Pizzi, F and Gliozzi, TM (2001). Changes in sperm quality and lipid composition during cryopreservation of boar semen. Reproduction. 121: 395-401.
CONAGUA (2015). Servicio Meteorológico Nacional. http://smn.cna.gob.mx/es/ informacion-climatologica-ver-estado?estado=coah. Consultado 14 Nov, 2018.
Fleisch, A; Malama, E; Witschi, U; Leiding, C; Siuda, M; Janett, F and Bollwein, H (2017). Effects of an extension of the equilibration period up to 96 hours on the characteristics of cryopreserved bull semen. Theriogenology. 89: 255-262.
Fonseca, JF; Torres, CAA; Maffili, VV; Borges, AM; Santos, ADF; Rodrigues, MT and Oliveira, RFM (2005). The hypoosmotic swelling test in fresh goat spermatozoa. Anim. Reprod., 2: 139-144.
Forouzanfar, M; Sharafi, M; Hosseini, SM; Ostadhosseini, S; Hajian, M; Hosseini, L and Nasr-Esfahani, MH (2010). In vitro comparison of egg yolk-based and soybean lecithin-based extenders for cryopreservation of ram semen. Theriogenology. 73: 480-487.
Garrett, FE; Goel, S; Yasul, J and Koch, RA (1999). Liposomes fuse with sperm cells and induce activation by delivery of impermeant agents. Biochim. Biophys. Acta Rev-Biomembr., 1417: 77-88.
Gharibi, S; Niasari-Naslaji, A; Poursasan, N and Moosavi-Movahedi, AA (2014). Replacement of salamon with shotor diluent and egg yolk with low density lipoprotein for chilled storage of ram semen. Iran. J. Vet. Res., 15: 279-284.
Gürler, H; Malama, E; Heppelmann, M; Calisici, O; Leiding, C; Kastelic, JP and Bollwein, H (2016). Effects of cryopreservation on sperm viability, synthesis of reactive oxygen species, and DNA damage of bovine sperm. Theriogenology. 86: 562-571.
Jerez, R; González, N; Olaciregui, M; Luño, V; de Blas, I and Gil, L (2016). Use of soy milk combined with different cryoprotectants for the ram semen cryopreservation. Small Rumin. Res., 134: 34-38.
Jiménez-Rabadán, P; Soler, AJ; Ramón, M; García-Álvarez, O; Maroto-Morales, A; Iniesta-Cuerda, M and Garde, JJ (2016). Influence of semen collection method on sperm cryoresistance in small ruminants. Anim. Reprod. Sci., 167: 103-108.
Kaeoket, K; Sang‐Urai, P; Thamniyom, A; Chanapiwat, P and Techakumphu, M (2010). Effect of docosahexaenoic acid on quality of cryopreserved boar semen in different breeds. Reprod. Domest. Anim., 45: 458-463.
Kafi, M; Safdarian, M and Hashemi, M (2004). Seasonal
variation in semen characteristics, scrotal circumference and libido of Persian Karakul rams. Small Rumin. Res., 53: 133-139.
Küçük, N; Aksoy, M; Uçan, U; Ahmad, E; Naseer, Z; Ceylan, A and Serin, I (2014). Comparison of two different cryopreservation protocols for freezing goat semen. Cryobiology. 68: 327-331.
Kumar, P; Saini, M; Kumar, D; Balhara, AK; Yadav, SP; Singh, P and Yadav, PS (2015). Liposome-based semen extender is suitable alternative to egg yolk-based extender for cryopreservation of buffalo (Bubalus bubalis) semen. Anim. Reprod. Sci., 159: 38-45.
Murphy, EM; O’Meara, C; Eivers, B; Lonergan, P and Fair, S (2018). Comparison of plant-and egg yolk-based semen diluents on in vitro sperm kinematics and in vivo fertility of frozen-thawed bull semen. Anim. Reprod. Sci., 191: 70-75.
Osuagwuh, UI and Palomo, MJ (2017). Effect of semen washing on thawed ram spermatozoa subjected to a four hour post-thawing thermal evaluation test. Small Rumin. Res., 155: 81-86.
Pillet, E; Labbe, C; Batellier, F; Duchamp, G; Beaumal, V; Anton, M and Magistrini, M (2012). Liposomes as an alternative to egg yolk in stallion freezing extender. Theriogenology. 77: 268-279.
Röpke, T; Oldenhof, H; Leiding, C; Sieme, H; Bollwein, H and Wolkers, WF (2011). Liposomes for cryopreservation of bovine sperm. Theriogenology. 76: 1465-1472.
SAS (2005). Statistical Analysis System: A User’s Guide. Version 9.1, Statistical Analysis Systems Institute, Inc., Cary, NC., USA.
Stewart, JL; Shipley, CF; Ellerbrock, RE; Schmidt, L; Lima, FS and Canisso, IF (2018). Physiological variations in reproductive and metabolic features of white-tailed deer (Odocoileus virginianus) bucks throughout the rutting season. Theriogenology. 114: 308-316.
Swami, DS; Kumar, P; Malik, RK; Saini, M; Kumar, D and Jan, MH (2017). Cysteamine supplementation revealed detrimental effect on cryosurvival of buffalo sperm based on computer-assisted semen analysis and oxidative parameters. Anim. Reprod. Sci., 177: 56-64.
Taghilou, P; Rostami, B; Masoumi, R and Mirzaei-Alamouti, H (2017). Effects of supplementation of the Tris-egg yolk extender with n-3 polyunsaturated fatty acids (PUFAs) on frozen-thawed ram semen characteristics. Small Rumin. Res., 155: 1-5.
Valente, SS; Pereira, RM; Baptista, MC; Marques, CC; Vasques, MI; Pereira, MS and Barbas, JP (2010). In vitro and in vivo fertility of ram semen cryopreserved in different extenders. Anim. Reprod. Sci., 117: 74-77.
Yang, DH; Standley, NT and Xu, ZZ (2018). Application of liquid semen technology under the seasonal dairy production system in New Zealand. Anim. Reprod. Sci., 194: 2-10.
Vásquez, J; Florentini, EA; Camargo, LA; Gonzales, J and Valdivia, M (2013). Hypoosmotic swelling test in epididymal ram (Ovis aries) spermatozoa. Livest. Sci., 157: 618-622.
)