Intrauterine Devices (IUDs)

What is an IUD?

An intrauterine device (IUD) is a small, T-shaped contraceptive device that is inserted into the uterus to prevent pregnancy. It is one of the most effective forms of long-acting reversible contraception (LARC). Once inserted, it provides continuous protection for several years, depending on the type used, and can be removed at any time if pregnancy is desired.

IUDs are widely used around the world because they are reliable, low-maintenance, and suitable for many different stages of life — including after childbirth or during perimenopause. They are inserted during a simple clinic procedure and do not require daily action, such as taking a pill.

IUDs work in different ways depending on the type. Some release a small amount of hormone to prevent ovulation and thicken cervical mucus. Others contain copper, which affects sperm movement and prevents fertilisation.

Who is Suitable for IUDs?

IUDs are suitable for many women, including:

• Women seeking long-term contraception: Ideal for those wanting protection for up to 10 years
• Women who prefer low-maintenance contraception: No daily pills or frequent injections
• Women who cannot take oestrogen: Hormonal IUDs contain only progesterone
• Women with heavy or painful periods: Hormonal IUDs can significantly reduce menstrual bleeding and cramps
• Post-partum women: Can be inserted after childbirth once medically appropriate
• Women approaching menopause: Useful for contraception during perimenopause
• Teenagers and young women: Safe and effective for women of all reproductive ages

However, IUDs may not be suitable for women who:

• Have current pelvic infection
• Have certain uterine abnormalities
• Have unexplained vaginal bleeding
• Have copper allergy (for copper IUD users)

A proper medical assessment ensures safety and suitability.

Benefits of IUDs

IUDs offer several important advantages:

• Highly Effective: More than 99% effective at preventing pregnancy
• Long-Lasting: Protection ranges for up to 10 years, depending on the type
• Reversible: Fertility usually returns quickly after removal
• Low Maintenance: No daily or weekly action required
• Cost-Effective: Although insertion has an upfront cost, long-term use makes it economical
• Reduced Menstrual Bleeding (Hormonal IUD): Many women experience lighter periods or no periods
• Reduced Period Pain: Helpful for women with dysmenorrhoea
• Non-Hormonal Option Available: Copper IUD is hormone-free

For women with heavy menstrual bleeding, hormonal IUDs are often used not only for contraception but also as treatment.

Types of IUDs

There are two main categories of IUDs:

Hormonal IUD (Levonorgestrel-Releasing IUD)

These IUDs release a small amount of the hormone levonorgestrel (a form of progesterone).

Examples include:

• Mirena: Effective for up to 5–8 years
• Kyleena: Smaller device, effective for up to 5 years

Benefits include:

• Lighter periods
• Reduced cramps
• May stop menstruation altogether
• Lower risk of anaemia

Hormonal IUDs are often recommended for women with heavy bleeding, endometriosis-related pain, or adenomyosis.

Copper IUD (Non-Hormonal IUD)

Copper IUDs do not contain hormones. They release copper ions, which are toxic to sperm.

Examples include:

• Paragard: Effective for up to 10 years

Benefits include:

• Hormone-free contraception
• Long duration of action
• Can be used as emergency contraception if inserted within 5 days of unprotected intercourse

Some women may experience heavier or more painful periods, particularly in the first few months.

Alternative Options to IUDs

While IUDs are highly effective, other contraceptive options may suit different preferences or medical situations.

• Oral Contraceptive Pills: Taken daily; available as combined or progesterone-only pills
• Contraceptive Implant: A small rod inserted under the skin of the arm (lasts 3 years)
• Contraceptive Injection: Given every 3 months
• Vaginal Ring: Inserted monthly
• Contraceptive Patch: Applied weekly
• Barrier Methods: Condoms or diaphragms
• Permanent Sterilisation: Tubal ligation or vasectomy

The best option depends on:

• Age
• Medical history
• Desire for future pregnancy
• Hormone tolerance
• Lifestyle preferences

A discussion with a gynaecologist or GP helps determine the most appropriate choice.

What to Do Before an IUD Insertion?

Preparing properly for an intrauterine device (IUD) insertion helps ensure the procedure is safe, comfortable, and effective. Although insertion is relatively quick, a structured pre-procedure plan improves outcomes and reduces complications.

• Medical Assessment: Your doctor will review your medical history, menstrual pattern, contraception history, and any previous pelvic infections. This ensures an IUD is suitable for you.
• Pregnancy Exclusion: It is important to confirm you are not pregnant. This may involve timing the insertion during your menstrual period or performing a pregnancy test.
• Pelvic Examination: A physical examination may be performed to assess uterine size and position.
• Screening for Infection: If there are symptoms or risk factors for sexually transmitted infections (STIs), testing may be recommended before insertion.
• Discuss IUD Type: You and your doctor will decide between a hormonal IUD (such as Mirena or Kyleena) or a copper IUD, such as Paragard. The choice depends on bleeding patterns, hormone tolerance, and personal preference.
• Pain Relief Planning: Some women benefit from taking Panadol and Nurofen 30–60 minutes before the procedure to reduce cramping.
• Timing Considerations: Insertion is often easier during menstruation because the cervix is slightly more open, but it can be done at other times in the cycle.
• Arrange Transport (If Needed): Most women can drive afterwards, but if it is your first IUD insertion, consider arranging someone to drive you.
• Time off work: Please arrange to take the rest of the day off work.

Clear communication with your doctor about anxiety, pain tolerance, or previous difficult procedures helps tailor the experience to your needs.

IUD Insertion Procedure

The procedure is usually performed in a clinic setting and takes approximately 5–10 minutes.

• A speculum is inserted into the vagina
• The cervix is cleaned
• The IUD is inserted through a thin tube into the uterus
• The strings are trimmed

Some women experience cramping during or shortly after insertion. Pain relief can be provided if needed.

Aftercare and Follow-Up

After insertion:

• Mild cramping or spotting may occur
• Period patterns may change
• A follow-up appointment may be scheduled after 4–6 weeks

Women are advised to seek medical attention if they experience:

• Severe pelvic pain
• Fever
• Heavy bleeding
• Unusual discharge

These symptoms are uncommon but should be assessed.

IUD Prognosis

The long-term outlook for IUD users is excellent.

• Effectiveness: More than 99% effective in preventing pregnancy.
• Duration: Protection lasts up to 10 years, depending on the type.
• Reversibility: Fertility usually returns quickly after removal.
• User Satisfaction: High satisfaction rates due to convenience and reliability.

Hormonal IUDs are also used therapeutically to treat heavy menstrual bleeding and painful periods, improving the quality of life for many women.

Overall, IUDs are among the most reliable and safest contraceptive methods available when inserted by trained healthcare professionals.

IUD Risks

Although IUDs are very safe, as with any medical procedure, there are potential risks.

• Insertion Discomfort: Temporary cramping or pain.
• Irregular Bleeding: Common in the first few months.
• Expulsion: The device may partially or completely come out (approximately 2–10% of cases).
• Perforation: Rare (approximately 1 in 1,000 insertions), where the IUD passes through the uterine wall during insertion.
• Infection: Slight increased risk in the first 20 days after insertion.
• Ectopic Pregnancy: Very rare, but if pregnancy occurs with an IUD in place, medical assessment is urgent.

Most complications are uncommon and preventable with proper screening and technique.

Women with multiple sexual partners should continue using condoms, as IUDs do not protect against sexually transmitted infections.

What if IUD Insertion is Delayed?

Delaying IUD insertion may have several implications depending on individual circumstances.

• Risk of Unplanned Pregnancy: Without effective contraception, pregnancy risk continues.
• Ongoing Heavy or Painful Periods: Women using hormonal IUDs for menstrual control may continue experiencing symptoms.
• Hormonal Imbalance Management Delays: For those using IUDs as part of treatment for conditions such as heavy bleeding, adenomyosis, or endometriosis, symptom relief may be postponed.
• Increased Anxiety Around Contraception: Uncertainty about protection can impact emotional well-being.

If there are medical reasons to postpone insertion—such as an active infection —treatment is prioritised to ensure safe placement later.