Hormone replacement therapy (HRT), involving giving sex steroid hormones such as estrogen alone or with a progestogen, is widely used in postmenopausal women.HRT helps to relieve menopausal symptoms and has also been shown to prevent osteoporosis.Although most observational studies have showed that HRT can reduce the risks of cardio-cerebrovascular diseases, the subsequent randomized controlled trials were inconsistent with the results.This article reviews the relationship between HRT and stroke from drug type, route of administration, estrogen dosage, and initiation time.
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