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The study protocol was reviewed and approved by the Animal Ethics Committee of Northwest A&F University (the Institutional Animal Care and Use Committee, IACUC of the university, Approval Code: DK2023068, Approval Date: August 25, 2023). The experimental Suffolk rams in this study were owned by the research team. Only non-invasive semen collec-tion was performed on the rams, and all rams remained alive under normal feeding management after the ex-periment. The ovarian tissues used in the study were by-products generated during the routine commercial slaughter process of the abattoir. The research team did not participate in any animal slaughter-related proce-dures, and did not euthanize any live animals for the purpose of this study.","order":1,"name":"Ethics","label":"Ethics approval and consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":2,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"123"}}