Recent studies in Denmark and Netherlands determines that some birth control pills are safer than other and neither studies received any funding from companies that manufacture oral contraceptives.
European researchers say that the composition of woman’s birth control pills influences her risk of developing deep vein thrombosis.
Earlier studies already made it clear that oral contraceptives, which contain estrogen and progesterone, increases the risk of blood clots in lungs and leg and also leads to pulmonary embolism.
Pills containing a second-generation progestogen — levonorgestrel or norgestrel — and a low dose of estrogen are safest, they concluded.
The overall risk of venous thromboembolism is low, perhaps three for 10,000 woman-years for women in general, said Dr. Ojvind Lidegaard, a professor of obstetrics and gynecology at the Rigshospitalet in Copenhagen, and lead author of one of two reports.
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