**5. Conclusion**

Although semen fertility was difficult to measure due to the various parameters that inter‐ vene causing variations in the results, this preliminary study enabled us to demonstrate for the first time that bull semen that has been frozen then thawed in the LDL extender retains a good level of fertility since gestations were obtained following artificial insemination. The continuation of this study in a larger population would make it possible to specify the im‐ pact of the LDL extender on the success of artificial insemination.
