This post follows on from an earlier one with more information about contraceptive IUD’s (intra uterine devices). An IUD is highly effective at preventing pregnancy and works by preventing fertilisation. Once inserted you can ‘forget it’ and your fertility status can easily be reversed by removing it.
IUD’s are recommended for cost effective, long term contraception and can be used by most women unless they have a history of cervical infections or genital cancer.
The newest form of IUD or IUS (intra uterine system) releases a progesterone like hormone called Levonorgestrel and is sold under the name Mirena (introduced in 2000 and believed to be more than 99% effective) Protection lasts for 5 years- maybe even longer and, unlike the copper IUD, this type of IUD does not have the potential to cause anaemia. The original copper IUD- known by the names: TCu-380A (most widely used) the Multiload ML375, and Nova-T380- is also highly effective and is preferred by some women as it does not contain hormones and therefore does not interfere with a woman’s natural hormone levels. Protection lasts for 5-10 years depending on type.
You will be thoroughly checked by a doctor to make sure that you are a suitable ‘candidate’ for the insertion of an IUD and you should use this opportunity to ask lots of questions yourself, however silly they may appear. IUD’s do not travel around the body or interfere with your heart. IUD’s do not cause pelvic inflammatory disease (PID) if you don’t already have one.
If you have gonorrhea, chlamydia or purulent cervicitis it is not advisable to have an IUD inserted as you may be at risk of developing a PID within the first 20 days after insertion.
Insertion-takes 5- 10 minutes
Your doctor will insert your IUD into the top of your uterus through your vagina during the first 12 days of your menstrual cycle or at any time when he is certain that you are not pregnant. Some mild cramping may occur after insertion. To see a diagram of where the IUD is placed go here.
Careful insertion reduces the chances of the uterus contracting and expelling the IUD and also avoids perforation of the uterine muscle wall. If perforation does happen (rate fewer than 2 per 1000) it is usually obvious and the IUD is removed at once without serious damage occurring.
Can the IUD come out on its own?
Unlikely if it is inserted correctly -but 2-8 women per 100 expel their IUD’s in the first year and usually within 3 months of insertion. Some studies show that young women, aged 20-25 and women who have not had children account for several cases within this range.
Side effects
There is a slight chance of infection if the IUD is not inserted carefully/correctly. Serious complications with IUD’s are very rare.
Copper IUD -The main reason that stopped some women using the copper IUD was increased bleeding and cramping, in some cases up to 50% above ‘normal’ levels prior to IUD use. The new copper IUD’s only ‘moderately increase’ blood flow. Increased blood loss can lead to a decrease in iron levels and subsequently lead to anaemia in women who are already low in iron.
Hormone IUD -can eventually decrease bleeding due to the thinning of the uterine lining caused by the progestin hormone. After a year of having an IUD inserted 20- 35% of women have no bleeding at all. Side effects of hormone IUD’s occur in fewer than 5% of women, (hormone is released in the uterus and is not processed by the liver) are similar to those experienced with oral contraceptives such as acne or other skin problems, back pain, breast tenderness, headache, mood changes and nausea.
What if I get pregnant when I have an IUD fitted?
The chance of you getting pregnant with an IUD insertion is rare. If you do conceive you risk severe complications such as miscarriage so go to your doctor immediately if you suspect that you may be pregnant and if confirmed, he will remove the IUD.
Are there any cancer risks with IUD’s?
IUDs may reduce the risk of cancer of the uterus but read this report for yourself.
A final reminder: IUD’s do not protect against HIV/STD’s.
Sources: Salem, R. “New Attention
to the IUD:Expanding Women’s Contraceptive
Options To Meet Their Needs.” Population
Reports, Series B, No. 7. Baltimore, Johns
Hopkins Bloomberg School of Public
Health,The INFO Project, February 2006.