Mechanisms of Microgynon 30

Combined Contraceptive Pill »

There are three mechanisms by which Microgynon 30 works. Collectively, they greatly reduce the risk of pregnancy and if you use the pill correctly, it is highly unlikely that you will fall pregnant. The pill has not one but three mechanisms to ensure that it is over 99% effective.

Every month, your body releases an egg as a result of your menstrual cycle. During this cycle, an egg is matured and released whilst the uterus prepares for pregnancy. When no pregnancy occurs, the uterus wall will break down and this forms a period. The best way to prevent pregnancy is to ensure that an egg is not released. Oestrogen and progestogen control this process in your body by fluctuating their levels. The pill produces a steady stream of these hormones into your body so that your body thinks an egg has already been released. Therefore no egg will be released during the month and it is unlikely that you will fall pregnant.

In order for an egg to be fertilised, a sperm must reach it. Sperm have the enormous task of traversing the womb to reach an egg and this is a difficult process. The pill makes this process even harder by thickening the mucous layer inside the vagina to produce a more viscous fluid. This fluid usually keeps the vaginal area clean and when the pill affects it, it acts as an additional barrier so that the sperms chance of reaching the egg is reduced.

Finally, the pill also thins the uterus lining. This lining is usually thick in anticipation for pregnancy. The egg must implant into this wall once it has been fertilised, and it must do so in order to be successful. By making the wall thinner, there is less chance of the egg attaching to the wall and pregnancy will not occur.

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