Mirena is a hormonal intrauterine device that can provide long term birth control , it is T shape and releases a type of hormone progestin .
Mirena thickens mucus of cervix to stop the sperm . And it thins the lining of the uterus and supress the ovulation. It has been used for 5 years . It can be removed at any time , it can be used while breast feeding. It doesnt contain estrogen .

Mirena can decrease menstrual bleeding after 3-4 months of use. Mirena can be prescribed for women with heavy menstrual bleeding, cramping and pain, endometriosis, endometrial growth of lining of the uterus , and for myomas ( fibroids).
When mirena can not be used? If someone has unexplained vaginal bleeding, pelvic inflammatory disease, liver disease, uterine or cervical or breast cancer .
Some one must be alert about usage of it when they have migrain, heart problem, diabetes, clotting problems .
Side effects of mirena: Headache, acne, breast tenderness, irregular bleeding, mood changes , cramping , pelvic pain.
Mirena can be inserted anytime of menses if someone is not pregnant. But it is better to insert at menses time because of at that time cervical os is more proper than the other times.