Pregnancy and Autoimmune Disease: Safe Medications and Smart Planning
Dec, 15 2025
When you have an autoimmune disease and are thinking about getting pregnant, the biggest question isn’t just can I get pregnant-it’s can I stay healthy while keeping my baby safe. For too long, women were told to stop their meds before conceiving, hoping their disease would stay quiet. But that approach often backfired. Today, the science is clear: uncontrolled disease is far more dangerous than most medications.
Why Stopping Meds Can Be Riskier Than Taking Them
Many women with lupus, rheumatoid arthritis, or psoriatic arthritis worry that their meds might harm the baby. That fear leads some to stop treatment on their own, sometimes months before trying to conceive. But here’s what the data shows: if your disease flares during pregnancy, your chances of preterm birth, preeclampsia, or even miscarriage jump dramatically. For example, women with lupus who have active disease during pregnancy are 3 to 5 times more likely to develop preeclampsia than those whose disease is under control. The same goes for preterm birth-uncontrolled inflammation increases the risk by nearly 3 times. On the flip side, continuing hydroxychloroquine (Plaquenil) cuts lupus flares by two-thirds and reduces preterm birth risk by half. That’s not a small benefit. That’s life-changing.Which Medications Are Safe During Pregnancy?
Not all autoimmune drugs are created equal. Some are safe. Some are dangerous. And some? We’re still learning. Here’s what the latest guidelines from EULAR (2025) and the British Society for Rheumatology say:- Hydroxychloroquine: Safe throughout pregnancy and breastfeeding. Used by over 12,000 women with no increase in birth defects. It also protects the baby from neonatal lupus. Keep taking it.
- Azathioprine: One of the most studied drugs in pregnancy. Used for over 5,800 pregnancies with 95% safety. Only 2.1% of babies were born preterm-compared to 8.7% if the mom’s disease was active.
- Sulfasalazine: Safe. No signs of birth defects in over 3,200 pregnancies.
- Corticosteroids (like prednisone): Can be used if needed, but aim for the lowest effective dose. Long-term high doses may slightly increase risk of gestational diabetes or high blood pressure.
- TNF inhibitors: Certolizumab pegol (Cimzia) is the safest choice for the third trimester because almost none crosses the placenta. Adalimumab (Humira) and infliximab (Remicade) cross more, so many doctors recommend stopping them after 30 weeks. But do not stop them early-flares are worse than exposure.
- Antimalarials, IVIG, and some biologics: Generally safe. Many pass into breastmilk in trace amounts, but none have been linked to infant harm.
Medications to Avoid Before and During Pregnancy
These drugs are not safe. Period.- Methotrexate: A known teratogen. Causes serious birth defects-cleft palate, missing limbs, brain abnormalities. Must be stopped at least 3 months before trying to conceive. Some women need longer.
- Mycophenolate (CellCept, Myfortic): Extremely risky. Linked to 24.4% rate of major birth defects, including ear, eye, and heart problems. FDA has a black box warning. Stop at least 6 weeks before conception, but 3 months is safer.
- JAK inhibitors (tofacitinib, upadacitinib): Not recommended. While Japan’s data is less alarming, U.S. and European guidelines still advise against use. The risk isn’t fully known, and the stakes are too high.
Don’t just stop these drugs cold turkey. Work with your rheumatologist to switch to safer options well in advance. Waiting until you’re pregnant to make a change is too late.
Timing Matters: The 6-Month Preconception Window
This isn’t a suggestion. It’s a requirement. If you’re on methotrexate or mycophenolate, you need at least 3 to 6 months to switch to a pregnancy-safe alternative. Why? Because these drugs stay in your system longer than you think. Even if you feel fine, the drug can still affect an early embryo before you even know you’re pregnant. The ideal plan:- See your rheumatologist 6-12 months before trying to conceive.
- Get your disease under control-low disease activity is the goal.
- Switch any unsafe meds to approved alternatives.
- Start folic acid (at least 0.8 mg daily) to reduce neural tube defects.
- Get a preconception checkup with a maternal-fetal medicine specialist.
Women who follow this plan have a 53% lower chance of accidentally stopping their meds and a 37% higher chance of delivering a full-term baby. That’s not luck. That’s planning.
What About Breastfeeding?
Yes, you can breastfeed. Most autoimmune medications are safe while nursing. Biologics like adalimumab, etanercept, and certolizumab pass into breastmilk in tiny amounts-often less than 0.1% of the mother’s dose. Infants absorb almost none of it. Studies show no increase in infections, developmental delays, or immune problems in babies exposed through breastmilk. Even methotrexate in low doses (under 25 mg/week) is considered safe for breastfeeding by some experts, though most still recommend avoiding it. If you’re on it, talk to your doctor. There are better options.Real Stories, Real Outcomes
One woman, 32, with lupus, kept hydroxychloroquine and low-dose prednisone throughout her pregnancy. Her baby was born at 39 weeks, weighed 7 pounds 10 ounces, and had no complications. She posted: “I didn’t stop anything. My doctor told me what to do. I trusted the science.” Another, 28, with rheumatoid arthritis, stopped her adalimumab after her OB said “it’s better to be safe.” Within weeks, her joints swelled. By 20 weeks, she was on 20 mg of prednisone daily. She developed gestational diabetes. Her son was born at 34 weeks. She told her story: “I thought I was protecting him. I didn’t know I was hurting him.” These aren’t rare cases. They’re common. And they’re preventable.
The New Standard of Care
Ten years ago, few doctors had training in autoimmune disease and pregnancy. Today, that’s changing. In 2024, the American Board of Medical Specialties officially recognized Maternal-Fetal Medicine sub-specialization in Rheumatology. There are now 87 dedicated autoimmune pregnancy clinics in the U.S.-up from just 12 in 2015. The best outcomes come from teams: a rheumatologist, an OB who specializes in high-risk pregnancies, and a pharmacist who understands drug timing and interactions. No one person can manage this alone. And the research is accelerating. The NIH launched a $12.7 million network in January 2024 to study newer drugs in pregnancy. By 2026, we’ll have better data on JAK inhibitors and newer biologics. But right now? We have enough to make smart, safe decisions.What You Should Do Next
If you’re planning a pregnancy and have an autoimmune disease:- Don’t wait. Start planning now.
- Find a rheumatologist who specializes in pregnancy.
- Ask for a full medication review-not just “what can I take,” but “what should I stop, and when.”
- Get your disease into remission before conceiving.
- Take folic acid daily.
- Bring your partner to appointments. This isn’t just your journey.
There’s no such thing as a “perfect” pregnancy with an autoimmune condition. But there is such a thing as a safe, planned, and supported one. And it starts with knowing the facts-not the fears.
Can I continue my biologic medication during pregnancy?
Yes, many biologics are safe. Hydroxychloroquine, azathioprine, and certolizumab pegol are well-studied and recommended throughout pregnancy. TNF inhibitors like adalimumab and etanercept are generally safe too, but many doctors pause them after 30 weeks to reduce exposure near delivery. Certolizumab is preferred in the third trimester because it barely crosses the placenta.
Is it safe to breastfeed while taking autoimmune meds?
Almost all autoimmune medications are safe during breastfeeding. Biologics like adalimumab, infliximab, and certolizumab pass into breastmilk in extremely small amounts-often less than 0.1% of the mother’s dose. Babies absorb almost none of it. Studies show no increased risk of infection or developmental issues in exposed infants.
What if I got pregnant while on methotrexate or mycophenolate?
Stop the medication immediately and contact your rheumatologist and OB right away. While these drugs carry serious risks, not every exposure leads to birth defects. An early ultrasound and genetic counseling can help assess fetal health. The goal is not panic-it’s rapid action and close monitoring.
Do I need to see a specialist before trying to conceive?
Yes. A rheumatologist who works with high-risk pregnancies and a maternal-fetal medicine specialist should be part of your team before conception. Women who get this coordinated care are 53% less likely to stop their meds accidentally and 37% more likely to deliver at full term.
Are biosimilars safe during pregnancy?
Yes. Biosimilars like Amjevita and Hyrimoz (adalimumab biosimilars) are approved by the FDA as having the same safety profile as their reference drugs. If your original biologic was safe in pregnancy, so is its biosimilar. There’s no added risk.
How do I know if my disease is under control enough for pregnancy?
Your rheumatologist will use disease activity scores-like SLEDAI for lupus or DAS28 for rheumatoid arthritis-to measure how active your disease is. The goal is low or no activity for at least 3-6 months before conception. Flares in the 3 months before pregnancy increase the risk of complications. Stability matters more than perfection.
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