Mirena contains levonogestrel and is a small plastic T-shaped contraceptive device that contains the active ingredient levonorgestrel.
|Brand||Mirena||52 mg||1 Package||26390||Schering Plough||928||
It is an intrauterine system (IUS) that is inserted into the womb in a similar way to a contraceptive coil. Once inserted it steadily releases the levonorgestrel into the womb (uterus). Levonorgestrel is a synthetic form of the female sex hormone, progesterone. The levonorgestrel released from Mirena prevents pregnancy by increasing the thickness of the natural mucus at the neck of the womb. This makes it more difficult for sperm to cross from the vagina into the womb. By preventing sperm entering the womb, successful fertilisation of an egg is less likely.