The MPA believes the older, "second generation" form of pill should be offered to women as a first option. Ingmar Persson told Swedish Radio news Ekot that the risk of a blood clot was 50 percent higher with the new pill compared to the old. The "third generation " pill uses a slightly different combination of sex hormones and has been shown to reduce acne. Many young girls are said to choose the new generation of pill because of its benefits to the skin.
The Committee for Safety of Medicines (CSM) first recommended that third generation oral contraceptive pills should not be taken by women who were known to be at risk of venous thrombosis. However this risk of thrombosis is much smaller than that associated with pregnancy.