“May all be happy, may all be healed, may all be at peace and may no one ever suffer."
Combination oral contraceptives (COC) act by suppression of gonadotropins. Although the primary mechanism of this action is inhibition of ovulation, other alterations include changes in the cervical mucus (which increase the difficulty of sperm entry into the uterus) and the endometrium (which reduce the likelihood of implantation).