The purpose of this study is to obtain an estimate of the biochemical response rate as determined by CA125 response using the Gynecologic Cancer Intergroup (GCIG) response criteria of PD0332991 in patients with recurrent ovarian epithelial carcinoma. CA125 response is defined as ≥ 50% decrease from the baseline CA125 level and confirmed ≥ 21 days after initial evaluation (baseline is defined as the higher value of 2 pre-treatment CA125 assessments).