Abstract
This study evaluated the efficiency of a post-thaw diluent on the conception rate of timed artificial insemination (TAI), on the in vitro embryo production (IVEP), the fertilization rate and the computerized semen analysis. In the execution of all the techniques, semen straws of a single bull with previously known fertility were evaluated both as control and extender groups. The conception rate was similar (P = 0.517) between the extender (52.11%) and the control group (55.48%), but the extender group showed a reduction (P < 0.001) in the number of doses per conception (0.95 for the extender vs. 1.80 for the control). We evaluated the rates of cleavage (81.56 vs. 78.52%), blastocyst formation (36.10 vs. 39.48%) and hatching (47.28 vs. 41.97%) on the IVEP and assessed the fertilization rate by counting pronuclei (61.76 vs. 65.22%). Importantly, we found that these measures did not differ (P > 0.05) between the extender and control group, respectively. The total (58.1 vs. 58.3%) and progressive (42.4 vs. 40.0%) motility post-thawing did not differ (P > 0.05) between the extender vs. the control group, respectively. However, when comparing different moments post-thawing (0 h, 10 min, 3 h, 6 h, 8 h e 12 h), initially (3 h) the extender group had a higher (P < 0.05) percentage of total motility (58.7 vs. 48.0%). Subsequently (8 h), the motility decreased (P < 0.05) in comparison to the control group (7.3 vs. 22.6%). In conclusion, the use of extender post-thawing was effective in TAI, reducing the number of doses per conception but not influencing the IVEP. Therefore, this extender allowed for the more efficient use of semen of high genetic value, reducing the cost per pregnancy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.