{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T18:17:54Z","timestamp":1783448274773,"version":"3.55.0"},"reference-count":15,"publisher":"Bioscientifica","issue":"4","license":[{"start":{"date-parts":[[2026,6,13]],"date-time":"2026-06-13T00:00:00Z","timestamp":1781308800000},"content-version":"vor","delay-in-days":255,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["journals.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,10,1]]},"abstract":"<jats:sec>\n                    <jats:title>Summary<\/jats:title>\n                    <jats:p>We report a 27-year-old male with a rare chromosomal anomaly involving a ring Y chromosome (RCY). Our patient presented with severe oligozoospermia in the absence of other overt phenotypic abnormalities and was ultimately found to have mosaicism involving a ring Y chromosome. This case highlights the importance of considering structural Y chromosome abnormalities in the evaluation of male infertility, even in individuals with otherwise normal pubertal development and secondary sexual characteristics.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Learning points<\/jats:title>\n                  <\/jats:sec>","DOI":"10.1530\/edm-25-0113","type":"journal-article","created":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T11:30:32Z","timestamp":1763983832000},"update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-2","source":"Crossref","is-referenced-by-count":1,"title":["Ring Y chromosome as an unusual cause of severe oligozoospermia"],"prefix":"10.1530","volume":"2025","author":[{"given":"Serena","family":"Chong","sequence":"first","affiliation":[{"name":"1"},{"name":"2"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher 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