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They start working immediately if that's your question. If you mean how long they work for, Mirena is up to 5 years and the copper wire type can last up to 10 years.
The ParaGard IUD is effective immediately.

The Mirena IUD is effective immediately if inserted within seven days after the start of your period.

If you have Mirena inserted at any other time during your cycle, use another method of Birth Control like a condom or spermicide during the first week after insertion.

Protection begins after seven days.
Now
You can have sex right away. Use a condom for the first week (7 days) after getting Mirena.
2weeks

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Wiki User

11y ago
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10y ago

The IUD is very effective, but it is possible to get pregnant while using one for birth control. Effectiveness depends upon the actual type of IUD, whether it is copper or hormonal (e.g. Paragard). The theoretical effectiveness of IUDs is quite high:

  • When using the hormonal IUD, about 2 out of 1,000 women become pregnant in the first year.
  • When using the copper IUD, about 6 out of 1,000 women become pregnant in the first year.

A 2012 study published in the New England Journal of Medicine showed that over a period of three years, 9.4% of women using birth control pills, patches, or vaginal rings became pregnant accidentally, compared to just 0.9% of women who opted for IUDs or implants.

Most pregnancies that occur with IUD use happen because the IUD is pushed out of (expelled from) the uterus unnoticed. IUDs are most likely to come out

  • in the first few months of IUD use
  • after being inserted just after childbirth
  • in women who have not had a baby before.
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Wiki User

13y ago

IUDs are one of the most effective forms of birth control available. Less than 1 out of 100 women will get pregnant each year. Once it is put in place, you only need think about BC once a month, when checking to make sure the string is still in place.

If used perfectly, BCP has about the same effectiveness - less than 1 out of 100 will become pregnant in a year. Because we are not perfect and sometimes we may forget to take the pill, 8 out of 100 women will become pregnant from not always taking the pill as directed.

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8y ago

The Mirena IUD is safe and effective. It is considered a highly-effective method. IUDs and contraceptive implants are recommended as first-choice methods for adolescents by the American Academy of Pediatrics and ACOG. Talk with your healthcare provider for advice specific to your situation.

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11y ago

Mirena is effective for five years, ParaGard (copper IUD) effective for ten years, and Skyla is effective for three years.

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9y ago

The IUD Mirena is a very good birth control. Only about 5% of women each year get pregnant each year while on the Mirena.

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Q: How effective is the IUD?
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Related questions

Is it safe to come inside a woman with an IUD?

an IUD prevents pregency, but it is not always effective. ( For a better answer, have the couple talk to a doctor about effective birth control ). WikiAnswers does not practice medicine.


What is the consequence if the IUD doesnt come out in five years?

There are no health consequences to leaving the IUD in longer than five years, but a hormonal IUD may not be effective past its useful life span.


What does it mean if you see IUD?

If you can see your IUD, it is not protecting you from pregnancy. Use a backup method and see your health care provider to discuss effective options for pregnancy prevention.


Is IUD good for people who have not given birth?

The IUD is safe and effective in women who have not given birth. There may be a bit more cramping during insertion for a woman who has not had a vaginal delivery.


How soon after your IUD is 10 years must you remove it?

If you leave the copper IUD in too long, there are no potential health problems. If you leave a hormonal IUD like Mirena in too long, you may not be protected against pregnancy, but there are no other risks.


What is the hormonal IUD contraceptive method?

Hormonal IUD is an effective contraceptive method. The IUD (levonorgestrel intrauterine device) is a hormonal method. It is a small, T-shaped piece of plastic. The IUD is put into the uterus. Once there, it makes the lining of the uterus thinner and thickens the mucus of the cervix. This prevents the sperm from fertilizing the egg. IUDs offer 3, 4 or 5 years of protection (depending on the type). If you want to get pregnant, you can have the IUD removed. IUD are one of the most effective methods. 99 in every 100 individuals using this method will manage to prevent pregnancy. To know more visit findmymethod.org website.


Can an IUD cause abrasions on a man?

The IUD is in the uterus, and a man does not enter the uterus during sex. If you or your partner can feel part of the IUD in the cervix, and that's scraping him, the IUD is not likely to be effective. Take the morning after pill if you 've had sex in the last five days, and contact your health care provider for an exam. Don't rely on the IUD to prevent pregnancy if you can feel the plastic of the device in the cervix.


What do you do when your IUD strings are longer then they have been?

If your IUD strings feel longer, it could be a sign that the IUD is not in the correct place and is no longer effective. Take the following steps:Consider emergency contraception if you've had sex in the last five days.If you have sex, use a condom as additional prevention.Get an appointment with your health care provider to evaluate the position of the IUD.


Had the IUD mirena for about 4 months your breast or really tender can you be pregnant?

IUD's are around 99+% effective against unintended pregnancies, thus the risk of pregnancy is increadibly low. Breast tenderness does not equate to pregnancy, it could be a reaction to hormones in the IUD or breast growth.


When does the copper IUD become effective?

If you start within the first five days of menstrual bleeding, the contraceptive implant is effective immediately. If you start at any other time during your period, you need to use a backup for the first seven days.


Who can get an IUD?

Any woman interested in a long-term, reversible, highly effective method of birth control can get an IUD. There are two on the market in the US right now, and they have some differences in mode of action and patient selection criteria. In general, a woman who is a good candidate for an IUD has no allergies to the components of the IUD, and has a uterus long enough to accommodate the device.


Can you become pregnant if your IUD is out of place?

Yes. The IUD is effective when it's in the right place, at the top of the uterus. If it comes partially or completely out of the uterus, you can get pregnant.