A 32-year-old woman was admitted to our internal medicine ward for dyspnea and pain in right hemithorax. Patient was on folic acid 5 mg/day and progesterone 600 mg/day due to invitro-fertilization treatment. Physical examination revealed heart rate was 110 bpm, Oxygen saturation was 93% and right basal hypophonesis on her chest was noted. The dyspnea-onset started 5 days before eventually progressing at rest. Laboratory findings indicated increased hematocrit and leukocytosis with evidence of hypersegmented neutrophils (Hematocrit 48%, WBC 19.5 x 109/L-Neutrophils 84.5%). X-rays revealed moderate pleural effusion in right hemithorax and CT-scan showed no signs of pulmonary embolism but confirmed bilateral pleural effusion with a right predominance and free peri-splenic fluid. In addition, a transvaginal-US was performed (Figure 1).

Keywords: Ovarian hyperstimulation syndrome; Assisted reproductive technology