It is the most widespread way of contraception. If it is taken properly and regularly, the contraceptive pill is more than 99% effective. Only one missed intake can cause the failure of the method.
All the contraceptive pills have one or two hormones, the progestin alone, or in association with oestrogens, which are close to the natural female hormone.
There are 2 types :
The pill works at different levels: it blocks the ovulation, thins the internal wall of the uterus (endometrium) and changes the consistency of the cervical mucus which is secreted by the uterine cervix. The cervical mucus gets thicker and prevents the movement of the sperm.