What are the chances of getting pregnant on the pill?
The contraceptive pill is considered one of the most effective contraceptives. With ideal use, the pill is 99% effective. Out of 100 women who use the pill over the course of one year, less than one will get pregnant. The pill is considered to be more effective than the use of condoms alone.
However, the safety of your contraception depends on how you take your pill. It is important that you follow the instructions in the patient leaflet carefully. You should take care not to forget to take the pill
and always check whether any medication you are prescribed could reduce the effectiveness of the pill.
The pill works in three ways to stop you getting pregnant. It suppresses ovulation, which means that your ovaries won’t release a mature egg. In addition, the pill thickens the mucus at the entrance to the womb, which makes it harder for sperm to enter.
Finally, the hormones in the pill also cause changes to the lining of your womb. These changes reduce the risk that a fertilised egg can implant. Only if all three mechanisms fail will you become pregnant.