What is an Intrauterine Device (IUD)?

An intrauterine device (IUD) is a small T-shaped plastic contraceptive device inserted through the opening of your cervix into your uterus by your gynecologist, in a procedure that takes 5 to 10 minutes. It has a string attached at the end, which hangs into the vagina to help you check that it is in place. You should check for the string after each period and after sexual intercourse. The IUD is a longer-lasting form of contraception and can stay in place for 5–10 years.

Types of IUDs

Non-hormonal Copper T IUD

This IUD is made with copper and plastic and contains no hormones. The copper acts as a spermicide, killing any sperm. It can prevent pregnancy as soon as it is placed by stopping sperm from reaching and fertilizing an egg. It provides protection for up to 10 years.
These are one of the most effective emergency contraceptive devices when used within five days of unprotected sex.

Hormonal IUDs

Hormonal IUDs are effective for 3 to 5 years, depending upon the type used. They contain the hormone progestin. Progestin prevents pregnancy by thickening the cervical mucus and thinning the lining of the uterus, thus stopping the sperm from reaching and fertilizing an egg. Hormonal IUDs are not an emergency contraceptive device, as they take a week to start working.

Fitting an IUD

Before inserting an IUD, your doctor will perform a pelvic examination to assess the size, shape, and depth of your uterus. You may also be tested for any sexually transmitted infections. Fitting the IUD is painless and usually takes no longer than 5 minutes. Your doctor will place the IUD through the cervix, and into your uterus. Depending on the type, you may have to use alternative birth control for about a week.

You may notice slight discomfort, mild cramping, and bleeding for the first 1–2 days. It should be noted that IUDs do not provide protection against STDs or HIV.

Your IUD can be removed by your doctor at any time and you can get pregnant as soon as it is removed.

Advantages of an IUD

Advantages include:

Prevents pregnancy for 5to10 years, depending on the type
No hormonal side effects, such as headaches, acne or breast tenderness
Doesn't interrupt sex
Safe to use while breastfeeding
Can get pregnant as soon as it is removed

Disadvantages of an IUD

Disadvantages include:

Heavier, longer or more painful periods for the first few months
Do not provide protection against STIs/STDs
May cause pelvic infection
Vaginal bleeding and pain, although these side effects are uncommon

Risks and Complications of an IUD

As with any procedure, IUDs may also be associated with certain risks and complications which include pelvic infections, rejection of the IUD by the uterus, or displacement of the IUD. This can cause damage to the uterus and there may be an increased risk of ectopic pregnancy if the IUD fails and you become pregnant.