Does anyone know if the mirena IUD prevents fertilization or implantation? I am nervous about getting one.?

Question

I don't want to get the IUD if it prevents implantation. I'm just not comfortable with that. I am scheduled to receive the Mirena IUD on March 13th and I haven't been able to find any answers to my question. I thought that it works like the pill but now I'm doubting myself. Any clue????

Answer 1

There is no single explanation of how Mirena works.
Mirena may:
Block sperm from reaching or fertilizing your egg
Make the lining of your uterus thin (this may also result in benefits like less menstrual bleeding over time)
Stop the release of your egg from your ovary (but this may not be the way it works in most cases)

I have Mirena and love it. I can tell you that I have not ovulated since getting it. I used to have painful ovulation. I no longer have heavy painful periods either.

Answer 2

The Mirena works like all other coils in the fact it prevents implantation. There are two reasons why the implantation wont work. Firstly your body already believes you have something in your uterus ( you have -the coil) and therefore anything else that tries nesting there -ie an embryo will be seen as a foreign body and will be rejected by the body. This is how all coils work. The clever bit of the Mirena is that the actula coil contains progesterone which thins your lining of your uterus to virtually nothing. If you have a thin lining there is nothing for the embryo to bury itself into thus preventing implantation on this point as well. The mirena is believed to be as effective as sterilization ie 99.99% safe. The Mirena contain the same amount of progesterone as four pills that you take orally a but its guaranteed for five years (in the uk 8 in switzerland).

The pill is the only method of contraception that I can currently think of that will prevent fertilization (as it stops the egg being relased if taken correctly) except barrier methods.
Im guessing you dont want to have it as you think that you will be destroying a potential baby if the egg is fertilized.