The two active ingredients in Marlissa are synthetic versions of estrogen and progesterone called ethinylestradiol and levonorgestrel, respectively. These adjust your menstrual cycle to prevent pregnancy.
To create the conditions where you’re able to get pregnant, different hormones in your body rise and fall throughout the course of the menstrual cycle. The hormones in the pill help to supplement levels of certain types, and this then stops your menstrual cycle from happening as it normally would.