question: Hi, I'm writing on behalf of my girlfriend, she's on holiday atm. She's just texted asking if I can help with something. She's on Marvelon (contraceptive pill) and for the past couple days has found a brown discharge. She's in the middle of her course of pills, but forgot to take one of the pills one night, taking it the next morning and continuing as usual. What could be the cause of the discharge?