{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,27]],"date-time":"2026-10-27T14:28:37Z","timestamp":1793111317080,"version":"4.5.0"},"reference-count":43,"publisher":"The Korean Society for Reproductive Medicine","issue":"3","license":[{"start":{"date-parts":[[2024,4,11]],"date-time":"2024-04-11T00:00:00Z","timestamp":1712793600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/100012021","name":"Iran University of Medical Sciences","doi-asserted-by":"publisher","award":["97-4-4-13477"],"award-info":[{"award-number":["97-4-4-13477"]}],"id":[{"id":"10.13039\/100012021","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["ecerm.org"],"crossmark-restriction":true},"short-container-title":["Clin Exp Reprod Med"],"published-print":{"date-parts":[[2024,9,1]]},"abstract":"<jats:p>Objective: This study investigated the metabolic status of the spent culture media from embryos of patients with repeated implantation failure (RIF) undergoing in vitro fertilization\u2013intracytoplasmic sperm injection cycles in comparison with the embryos from healthy fertile women.Methods: Metabolite levels in spent culture media were assessed and compared between embryos from RIF patients (n=35) and oocyte donors as controls (n=15). Protein levels of insulin-like growth factor 1 (IGF-1) were determined using Western blotting. Concentrations of glucose, pyruvate, and lactate were measured using spectrophotometry. Ionic colorimetric assay kits were utilized to analyze the concentrations of sodium, chloride, calcium, and magnesium ions. High-performance liquid chromatography was employed to measure the concentrations of glutamic acid, aspartic acid, methionine, phenylalanine, and histidine.Results: Glucose consumption and lactate secretion were higher in the control group than in the RIF group. The magnesium concentration was significantly higher in the control group than in the RIF group, but glutamic acid and aspartic acid concentrations were lower in the control group than in the RIF patients (&lt;i&gt;p&lt;\/i&gt;&lt;0.05). The levels of IGF-1, sodium, calcium, chloride, methionine, histidine, and phenylalanine did not show statistically significant differences between the two groups.Conclusion: The metabolic profile of the culture medium of the embryos in the RIF group differed from that of the control group. These findings suggest potential factors that may affect implantation capacity in RIF patients and provide a new perspective on embryo selection.<\/jats:p>","DOI":"10.5653\/cerm.2023.06429","type":"journal-article","created":{"date-parts":[[2024,4,11]],"date-time":"2024-04-11T01:53:43Z","timestamp":1712800423000},"page":"260-267","update-policy":"https:\/\/doi.org\/10.5653\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Metabolomic profiling of embryo culture media in patients with repeated implantation failure during assisted reproductive technology 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