pubmed.ncbi.nlm.nih.gov
Hormonal contraception and risk of venous thromboembolism: national follow-up study - PubMed
The risk of venous thrombosis in current users of combined oral contraceptives decreases with duration of use and decreasing oestrogen dose. For the same dose of oestrogen and the same length of use, oral contraceptives with desogestrel, gestodene, or drospirenone were associated with a significantl…