Researchers in France and Glasgow carried out a systematic review and meta-analysis on some studies looking at the risk of venous thromboembolism in women taking hormone replacement therapy HRT) - the BBC reported.
They concluded that "current use of oral oestrogen increases the risk of venous thromboembolism by twofold to threefold" and they said that HRT patch may be safer but further research is needed.
The critics say this new study provides valuable evidence about the size of the risks and gives some idea of the difference between patches and pills, but women should not assume that it is unsafe to take HRT pills or patches are safe.
Source: "Hormone replacement therapy and risk of venous thromboembolism in postmenopausal women: systematic review and meta-analysis" BMJ, published 20 May 2008. Ahead of print ( f/t via Athens)
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