Diane 35 pills are classified as oral contraceptives. This is a daily hormone intake that makes the body think that ovulation has begun. This ensures that eggs in the ovaries do not mature preventing them from being released each month. The hormones also thicken the mucus on the walls of the womb making it hard for sperm to cross to the womb for fertilization. The Diane 35 pills also make the lining of the uterus unsuitable for implantation of the egg in case fertilization occurs.