Conclusions
In this study, we found, for the first time, that women with PCOS phenotypes A and D had an elevated risk of abortion after FET. We speculated that this was associated with the coexistence of OA and PCOM by affecting the quality of oocytes and embryos and the formation of a corpus luteum. The results of this study suggest that when performing FET, clinicians should individually manage women with PCOS phenotypes A and D to reduce the rate of abortion and achieve better pregnancy outcomes.