The principle of operation of the hormonal coil is similar to the action of combined oral contraceptives, hormonal implants and contraceptive injections. The action is aimed at blocking the process of ovulation (the release of an egg from the ovary) and delaying the development of the uterine mucosa, thereby making it difficult for the implantation of the fetal egg.
Mirena spiral is a reliable and effective means of protection against unwanted pregnancy, which has a long period of use.
Prescription medicine.