<![CDATA[Artificial insemination is a modern livestock breeding method that has been widely applied and proven effective in commercial farming systems. This study aimed to evaluate the success of artificial insemination using three types of semen extenders, namely Tris-egg yolk (T-EY), Citrate-egg yolk (C-EY), and Beltsville Thawing Solution-egg yolk (BTS-EY), supplemented with optimal levels of Moringa oleifera leaf extract (MLE), in order to determine the best extender. A total of 18 sows aged 1–2 years were inseminated using liquid semen. A descriptive method was applied to analyze non-return rate (NRR) and conception rate (CR), while a completely randomized design (CRD) was used for service per conception (S/C). The treatments consisted of P1: artificial insemination using T-EY + 2% MLE, P2: C-EY + 4% MLE, and P3: BTS-EY + 2% MLE. The observed variables were NRR, CR, and S/C. The results showed that the T-EY + 2% MLE extender achieved the highest CR and NRR, both reaching 100%, with an S/C value of 1.00. Meanwhile, the C-EY + 4% MLE and BTS-EY + 2% MLE treatments resulted in CR and NRR values of 83.33%, with an S/C value of 1.16. It can be concluded that the T-EY extender supplemented with 2% *Moringa oleifera* leaf extract was the best extender for liquid semen preservation of Landrace boars in artificial insemination programs.]]>
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