Cell models were constructed by transfecting OE-NC, OE-circMTO1, OE-circMTO1 + si-NC, and OE-circMTO1 + si-MCL1 into human granulosa-like tumor cells to elucidate the role of the circMTO1/miR-320b/MCL1 axis. This evidence concerns the gene MCL1 and neoplasm.