Can You Get an IUD While Breastfeeding? | Safe After Baby

Yes, you can safely get an IUD while breastfeeding. Both copper and hormonal IUDs are appropriate long-term contraceptive options during lactation.

The postpartum period brings enough questions without adding birth control uncertainty. Many new parents worry that an IUD — especially a hormonal one — might interfere with milk supply or cause other problems during breastfeeding. That concern keeps some people from choosing one of the most effective birth control methods available.

Here’s what the research actually shows: both copper and hormonal IUDs are generally considered safe during breastfeeding, and large studies suggest hormonal IUDs don’t affect a woman’s ability to lactate. The real questions aren’t about safety — they’re about timing, type, and a few specific risks worth understanding before you make the call.

Two Types of IUDs, One Cleared-for-Breastfeeding Answer

IUDs come in two main varieties. The copper IUD (ParaGard) releases no hormones at all, so it can’t influence milk production by design. It lasts up to 10-12 years and works by creating a copper-ion environment that’s hostile to sperm.

Hormonal IUDs — Mirena, Kyleena, Skyla, and Liletta — release progestin locally inside the uterus. Because the hormone stays mostly in the uterine cavity rather than circulating through the bloodstream, only minimal amounts reach breast milk. A 2017 University of Utah Health study found that even immediate postpartum placement of a hormonal IUD didn’t affect a woman’s ability to breastfeed.

Both types are listed as acceptable options by major health organizations including Planned Parenthood and the NIH’s LactMed database. The choice usually comes down to whether you prefer non-hormonal contraception or want the lighter periods that hormonal IUDs often provide.

Why Timing and Milk-Supply Worries Diverge

Most of the hesitation around IUDs and breastfeeding comes from a reasonable fear: will my milk supply drop? That worry is especially strong for hormonal options, even though the data doesn’t support it. A 2017 study tracked postpartum mothers who received a hormonal IUD within minutes of delivery — breastfeeding rates at 8 weeks were about 79%, a figure consistent with the general postpartum population.

• Copper IUD effect on supply: Zero. No hormones means no hormonal pathway to reduce milk production. This is the most straightforward choice if supply is your primary concern.
• Hormonal IUD effect on supply: The evidence is reassuring. The University of Utah study and LactMed both conclude that hormonal IUDs don’t measurably affect lactation for most women.
• Immediate vs delayed insertion: Getting an IUD right after delivery is convenient, but the expulsion rate is higher — roughly 2-10% compared to delayed insertion at 4-6 weeks postpartum.
• Individual response is real: A small number of women report perceived drops in supply with hormonal IUDs. If you notice a change, it’s worth discussing with your provider.

The bottom line on timing is practical rather than medical. Many providers prefer to insert an IUD at the 6-week postpartum visit simply because the uterus has returned to its pre-pregnancy size, which lowers the expulsion risk.

What the Research Says About Hormonal IUDs and Lactation

The strongest evidence comes from a 2017 trial conducted by University of Utah Health. Researchers randomly assigned women who had just given birth to receive a hormonal IUD either immediately or at 4-6 weeks postpartum. The result was clear: milk-production markers, breastfeeding duration, and infant growth were similar between groups. The study authors concluded that hormonal IUDs have no effect on lactation or breastfeeding outcomes, based on the hormonal IUD lactation study they conducted. This finding aligns with broader reviews from the BMJ’s Sexual & Reproductive Health journal, which found no increased risk of adverse events like bleeding or infection among breastfeeding IUD users compared to non-users. If you choose a hormonal IUD while nursing, the research consistently supports that decision.

Both options carry a similar overall safety profile during breastfeeding. The key difference lies in your preference for hormonal or non-hormonal contraception and how you want your cycle to behave.

What to Watch For: Risks Worth Understanding

While IUDs are broadly considered safe during breastfeeding, a few specific risks deserve attention. Manufacturer labeling notes slightly elevated risks for certain complications during the postpartum and breastfeeding period.

1. Uterine perforation: Mirena’s labeling states that the risk of perforation is increased if the device is inserted while you’re breastfeeding or soon after giving birth. The absolute risk is still very low — under 1% — but it’s worth discussing with your provider.
2. IUD embedding or attachment: ParaGard’s packaging notes an increased risk of the device becoming embedded in the uterine wall during breastfeeding. Again, this is uncommon but more likely in lactating women.
3. Expulsion: The uterus can push the IUD out, especially with immediate postpartum insertion. The risk drops significantly if you wait 4-6 weeks.

These risks are low enough that IUDs remain a top recommendation for postpartum contraception. Your provider can discuss how factors like your delivery method and breastfeeding pattern affect your personal risk profile.

Copper IUDs: The Non-Hormonal Option During Nursing

The copper IUD has a distinct advantage for breastfeeding parents: it’s completely hormone-free. Because ParaGard contains no progestin, there’s simply no biological pathway for it to affect milk production. The nationally recognized LactMed monograph from NCBI specifically endorses the copper IUD as acceptable during lactation, citing extensive safety data in the copper IUD breastfeeding safety resource. Another practical benefit is its longevity — once it’s in place, it provides reliable contraception for a decade or more without any maintenance. The trade-off is that periods may be heavier or more crampy, especially in the first few months. For some women that’s a minor inconvenience; for others it’s a reason to consider the hormonal option instead.

One sentence to carry forward: if your main priority is avoiding any hormonal exposure while nursing, the copper IUD is the simplest fit.

The Bottom Line

Both IUD types are safe to use while breastfeeding, and the hormonal versions don’t appear to affect milk supply for the vast majority of women. The main practical decision is timing — waiting 4-6 weeks after delivery lowers the expulsion risk — and whether you prefer a hormone-free option or one that may lighten your periods.

Your obstetrician or midwife can review your delivery history, breastfeeding pattern, and personal health factors to match you with the right IUD type and insertion timing for your postpartum recovery.