The Impact of the Menstrual Cycle on Perioperative Bleeding in Vitreoretinal Surgery

Figure 1

The flow chart of enrolled patients. VH: vitreous hemorrhage; DR: diabetic retinopathy; RVO: retina vein occlusion; VO: vitreous opacity; and ARN: acute retina necrosis. Group M: perimenstrual phase; group O: preovulatory phase.