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This case report introduces the \u201cdouble corpus luteum\u201d sign, a new sonographic and magnetic resonance imaging sign which is easily detectable and should raise the index of suspicion for heterotopic pregnancy. We present a surgically confirmed spontaneous heterotopic and angular pregnancy in a young woman without risk factors or assisted reproductive therapy to illustrate the utility of this novel sign.<\/jats:p>","DOI":"10.1002\/jcu.23006","type":"journal-article","created":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T17:38:59Z","timestamp":1616607539000},"page":"617-621","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The double corpus luteum: A novel sonographic sign of heterotopic pregnancy"],"prefix":"10.1002","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8767-8591","authenticated-orcid":false,"given":"Matthew L.","family":"Kluckman","sequence":"first","affiliation":[{"name":"Department of Radiology Brooke Army Medical Center  San Antonio Texas USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryan 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