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e potential for residual confounding exists, despite attempts to control for this with regression modeling. Women ≥40 years old who are unpartnered or in same-sex relationships can be counseled that their odds of a live birth are slightly better than women in heterosexual relationships utilizing their partner's sperm. These findings serve to further refine and individualize counseling on the expected IVF outcomes for women in this population. No funding was sought for this study. The authors declare no competing interests. N/A. N/A.