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However, links between GDM and T2D are not well understood. We used a well-characterised GDM prospective cohort of 1035 women following up to 8 years postpartum. Lipidomics profiling covering &gt;1000 lipids was performed on fasting plasma samples from participants 6\u20139 week postpartum (171 incident T2D vs. 179 controls). We discovered 311 lipids positively and 70 lipids negatively associated with T2D risk. The upregulation of glycerolipid metabolism involving triacylglycerol and diacylglycerol biosynthesis suggested activated lipid storage before diabetes onset. In contrast, decreased sphingomyelines, hexosylceramide and lactosylceramide indicated impaired sphingolipid metabolism. Additionally, a lipid signature was identified to effectively predict future diabetes risk. These findings demonstrate an underlying dyslipidemia during the early postpartum in those GDM women who progress to T2D and suggest endogenous lipogenesis may be a driving force for future diabetes onset.<\/jats:p>","DOI":"10.7554\/elife.59153","type":"journal-article","created":{"date-parts":[[2020,7,27]],"date-time":"2020-07-27T20:00:25Z","timestamp":1595880025000},"update-policy":"https:\/\/doi.org\/10.7554\/elife.59153","source":"Crossref","is-referenced-by-count":36,"title":["Underlying dyslipidemia postpartum in women with a recent GDM pregnancy who develop type 2 diabetes"],"prefix":"10.7554","volume":"9","author":[{"given":"Mi","family":"Lai","sequence":"first","affiliation":[{"name":"Department of Physiology, Faculty of Medicine, University of Toronto, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dana","family":"Al Rijjal","sequence":"additional","affiliation":[{"name":"Department of Physiology, Faculty of Medicine, University of Toronto, 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