I had chin/jawline acne. Its hormonal. I went on Yasmin BC. I would recommend it for the kind of blemishes you are getting. It should clear it right up.
I looked up Marvelon. It says:
MarvelonŽ, introduced by Organon in the early 1980s, is a monophasic combined low-dose oral contraceptive containing 150 microgram desogestrel (one of the first modern progestogens to become available) and 30 microgram ethinylestradiol.
I am not sure what this means, but I know Yasmin has YasminŽ drospirenone 3.0.
Thanks....