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The PEG precipitation test revealed that the high FSH level was almost exclusively due to the presence of autoimmune FSH immunoglobulin complex (macro-FSH). The profile obtained by gel filtration chromatography confirmed the presence of an FSH-immunoglobulin complex. Such immunological dysregulation could be explored in cases of unexplained infertility and recurrent IVF failure.<\/jats:p>","DOI":"10.1155\/2019\/3071649","type":"journal-article","created":{"date-parts":[[2019,9,22]],"date-time":"2019-09-22T19:30:37Z","timestamp":1569180637000},"page":"1-5","source":"Crossref","is-referenced-by-count":2,"title":["Abnormally Elevated Follicle-Stimulating Hormone (FSH) Level in an Infertile Woman"],"prefix":"10.1155","volume":"2019","author":[{"given":"Aurore","family":"Catteau","sequence":"first","affiliation":[{"name":"Laboratoire de biochimie, Institut de Biologie, CHU de Nantes, Nantes, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kalyane","family":"Bach-Ngohou","sequence":"additional","affiliation":[{"name":"Laboratoire de biochimie, Institut de Biologie, CHU de Nantes, Nantes, France"},{"name":"Facult\u00e9 de m\u00e9decine, Universit\u00e9 de Nantes, Nantes, 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