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The action star said that she had been unaware of the prevalence among pregnant women of cerebral venous thrombosis, or CVT, which is the development of a blood clot in the brain.

According to the American College of Obstetricians and Gynecologists, pregnancy and delivery increase the risk of thromboembolism, or circulating blood clots, including CVT.

A 2018 study published by the National Institutes of Health reported that CVTs make up about 0.5% of strokes and that up to 80% of CVT patients make a complete recovery, with 13% having a negative outcome such as death or severe disability.

CVT stands for cerebral venous thrombosis.

A 2020 study published in the journal Therapeutic Advances in Neurological Disorders said one adult per 100,000 is diagnosed with CVT every year - rising to three per 100,000 among women aged between 31 and 50.