Since their introduction, combined oral contraceptive
(COC) regimens have undergone a variety of changes to
improve safety, efficacy and tolerability profiles. Estrogen
doses have decreased to reduce side effects as well as
thrombotic risks associated with COCs. Modifications to the
biochemical structure of progestins have also been introduced
to help improve COC tolerability and acceptability
[1]. For example, COCs with desogestrel (DSG) have high
progestational activity and reduced androgenicity and have
been found to have good tolerability