The British Medical Journal has published research about additional evidence
that some of the more recent birth-control pills, including the best-seller
Yaz, have a greater risk of causing dangerous blood clots. It was discovered
that the synthetic hormone drospirenone, found in newer birth control
pills, amplified a six-fold risk increase of venous thromboembolism (VTE).
The FDA is now researching and studying pills containing drospirenone
to see if there is a possible increased risk of blood clots.