What is Mirena?
Mirena is a variation of the traditional coil. It looks like a flexible, plastic "T", and it prevents pregnancy in two ways: The hormone its reservoir, levonorgestrel, emits thickens your cervical mucus, thereby prevent sperm from entering your uterus. The second line of "defense" is the device itself; it makes the lining of your uterus thin, which means that any fertilized eggs could not implant there. Although Mirena can stop ovulation, it doesn't in most cases.
Mirena can be left in place for five years, but your fertility will return as soon as it is removed which can be at any time you choose. It is also highly effective, at 99 percent. If Mirena fails and you do become pregnant, its presence can create a dangerous situation for the fetus, though.
Is Mirena the right choice for you?
Mirena may be the right birth control choice for you if you are healthy, and have not got any untreated infections or sexually transmittable diseases. You should not have liver problems, immune system issues, or other underlying medical problems talk to your healthcare provider if you are not sure. Mirena, like other coils, may be easier to place in women who have already given birth.
Mirena is most suitable for women who want a reliable, long term, contraceptive and who are in a stable relationship (because obviously, Mirena does not prevent the spread of STDs only condoms do that).
The placement and removal process is relatively easy, but it is certainly not something you would go through for a couple of months of protection. Mirena can have side effects, like other hormonal contraceptives. They may include weight gain and irregular periods.