Functional analysis suggested that variation, in circadian genes including BMAL1, CRY2, CSNK1E, NPAS2, PER3, REV1, and downstream transcription factors KLF10 and SENP3 through disruption of hormonal pathways or changes in light/dark schedules, is associated with ovarian cancer. This evidence concerns the gene BMAL1 and ovarian carcinoma.