{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:54:51Z","timestamp":1792788891975,"version":"4.5.0"},"reference-count":36,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T00:00:00Z","timestamp":1790035200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation","award":["RGNS 64-026"],"award-info":[{"award-number":["RGNS 64-026"]}],"id":[{"id":"https:\/\/ror.org\/03cqd2v24","id-type":"ROR","asserted-by":"crossref"}]},{"award":["RGNS 64-026"],"award-info":[{"award-number":["RGNS 64-026"]}],"id":[{"id":"https:\/\/ror.org\/03cqd2v24","id-type":"ROR","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004704","name":"National Research Council of Thailand","doi-asserted-by":"publisher","award":["N42A660892"],"award-info":[{"award-number":["N42A660892"]}],"id":[{"id":"10.13039\/501100004704","id-type":"DOI","asserted-by":"publisher"}]},{"award":["N42A660892"],"award-info":[{"award-number":["N42A660892"]}],"id":[{"id":"https:\/\/ror.org\/018wfhg78","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Although anti-M\u00fcllerian hormone (AMH) is widely recognized as a marker of ovarian reserve, its expression in ovarian tissue of hyperprolific sows remains poorly characterized. This study investigated ovarian AMH expression across reproductive stages and evaluated its associations with ovulation rate and parity in hyperprolific Landrace \u00d7 Yorkshire sows. Ovarian tissues from thirty-one sows were collected after slaughter and classified according to reproductive stage, parity, and ovulation rate. AMH expression was assessed in primordial, primary, secondary, and antral follicles, as well as corpora lutea, using immunohistochemistry and was quantified with the H-score method. Anti-M\u00fcllerian hormone was localized to granulosa cells and oocytes throughout follicular development, as well as to luteal cells in the corpus luteum. Expression within ovarian follicles did not differ among follicle types, reproductive stages, parity groups, or ovulation rate classes. In contrast, luteal cells exhibited significantly greater AMH expression during the luteal phase than during the follicular phase (p &lt; 0.001). Antral follicles in primiparous sows appeared to show higher expression than those in multiparous sows, whereas no association was observed between AMH expression and ovulation rate. These findings demonstrate consistent ovarian AMH expression throughout follicular development and identify stage-dependent expression in luteal tissue. Notably, AMH expression was not associated with ovulation rate, indicating that AMH may reflect the size of the growing follicle pool rather than ovulatory capacity. The age-related trend observed in antral follicles supports the potential value of AMH as an indicator of reproductive longevity in hyperprolific sows.<\/jats:p>","DOI":"10.3390\/ani16192974","type":"journal-article","created":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T08:17:54Z","timestamp":1790065074000},"page":"2974","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ovarian Anti-M\u00fcllerian Hormone Expression in Hyperprolific Sows: Associations with Reproductive Stage and Parity, with Elevated Expression in the Corpus Luteum During the Luteal Stage"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4586-8634","authenticated-orcid":false,"given":"Duangkamol","family":"Lewchalermwong","sequence":"first","affiliation":[{"name":"Department of Veterinary Nursing, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4458-0433","authenticated-orcid":false,"given":"Yosua Kristian","family":"Adi","sequence":"additional","affiliation":[{"name":"Department of Reproduction and Obstetrics, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9856-1847","authenticated-orcid":false,"given":"Preechaphon","family":"Taechamaeteekul","sequence":"additional","affiliation":[{"name":"Centre of Excellence in Swine Reproduction, Department of Obstetrics, Gynaecology and Reproduction, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"}]},{"given":"Em-on","family":"Olanratmanee","sequence":"additional","affiliation":[{"name":"Faculty of Veterinary Medicine, Rajamangala University of Technology Tawan-ok, Chonburi 20110, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6507-6020","authenticated-orcid":false,"given":"Sawang","family":"Kesdangsakonwut","sequence":"additional","affiliation":[{"name":"Department of Veterinary Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7000-4371","authenticated-orcid":false,"given":"Padet","family":"Tummaruk","sequence":"additional","affiliation":[{"name":"Centre of Excellence in Swine Reproduction, Department of Obstetrics, Gynaecology and Reproduction, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"252","DOI":"10.1016\/j.morpho.2021.11.002","article-title":"Anti-M\u00fcllerian hormone: A function beyond the m\u00fcllerian structure","volume":"106","author":"Bertho","year":"2022","journal-title":"Morphologie"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Almeida, F.R.C.L., Costermans, N.G.J., Soede, N.M., Bunschoten, A., Keijer, J., Kemp, B., and Teerds, K.J. 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