Answer
Transdermal oestrogen has a lower clot risk than oral HRT, but this product must not be used with current or previous idiopathic venous thrombosis or a known thrombophilia. New clot symptoms require urgent assessment.
Sources for this answer
- Fem7 Conti, 50 micrograms / 7 micrograms / 24 hours, Transdermal patch — Current selected SmPCemc · Summary of Product Characteristics
- NHS