We describe the acute deterioration of a 29-year-old undergoing in vitro fertilisation. Late-onset critical ovarian hyperstimulation syndrome triggered a massive pulmonary embolism and subsequent cardiac arrest. While the prognosis was deemed to be poor, the patient made a full recovery. The potential reasons for this are explored.
Keywords: gynaecology and fertility; obstetrics; pulmonary embolism; ultrasonography; venous thromboembolism.
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