While there’s no single explanation for how Mirena works, most likely, the above actions work together to prevent pregnancy for up to 5 years.
http://heatherbestel.com/2008/12/the-sun-is-setting-on-2008/?replytocom=102 Mirena does not protect against HIV or STDs.
As soon as Mirena is placed in your uterus by your healthcare provider, it starts releasing small amounts of the hormone levonorgestrel into your uterus to provide continuous birth control for as long as you want, for up to 5 years.
Mirena and hormones
Mirena releases small amounts of levonorgestrel, a progestin hormone found in many birth control pills, locally into your uterus at a slow rate. Because of this, only small amounts of the hormone enter your blood. Mirena does not contain estrogen.
Mirena may also help treat heavy periods in women who choose intrauterine contraception. The hormone in Mirena reduces the monthly thickening of the uterine lining.
Only you and your healthcare provider can decide if Mirena is right for you. Mirena is recommended for women who have had a child. Important Safety Information
- Don’t use Mirena if you have a pelvic infection, get infections easily or have certain cancers. Less than 1% of users get a serious infection called pelvic inflammatory disease. If you have persistent pelvic or abdominal pain, see your healthcare provider.
- Mirena may attach to or go through the wall of the uterus and cause other problems. If Mirena comes out, use back-up birth control and call your healthcare provider.
- Although uncommon, pregnancy while using Mirena can be life threatening and may result in loss of pregnancy or fertility.
- Ovarian cysts may occur but usually disappear.
- Bleeding and spotting may increase in the first 3 to 6 months and remain irregular. Periods over time usually become shorter, lighter or may stop.
go here Mirena does not protect against HIV or STDs.
Skyla (levonorgestrel-releasing intrauterine system) is a hormone-releasing IUD that prevents pregnancy for up to 3 years.
Important Safety Information
- If you have a pelvic infection, get infections easily, or have certain cancers, don’t use Skyla. Less than 1% of users get a serious pelvic infection called PID.
- If you have persistent pelvic or stomach pain or if Skyla comes out, tell your doctor. If Skyla comes out, use back-up birth control. Skyla may attach to or go through the uterus and cause other problems.
- Pregnancy while using Skyla is uncommon but can be life threatening and may result in loss of pregnancy or fertility. Ovarian cysts may occur but usually disappear.
- Bleeding and spotting may increase in the first 3 to 6 months and remain irregular. Periods over time usually become shorter, lighter, or may stop.
go to link Skyla does not protect against HIV or STDs.
watch WARNING: You must continue to use another form of birth control until you have your Essure Confirmation Test (3 months after the procedure) and your doctor tells you that you can rely on Essure for birth control. For some women, it can take longer than three months for Essure to be effective, requiring a repeat confirmation test at 6 months. Talk to your doctor about which method of birth control you should use during this period. Women using an intrauterine device need to switch to another method. If you rely on Essure for birth control before receiving confirmation from your doctor, you are at risk of getting pregnant.