Can a Woman Get Pregnant While Taking Prednisone?

Prednisone does not prevent pregnancy. It is not a contraceptive, it does not reliably suppress ovulation, and in some situations it can actually restore fertility in women who were previously not ovulating. If you are taking prednisone and want to avoid pregnancy, you need a separate method of birth control. If you are taking prednisone and hoping to conceive, the drug itself is unlikely to stand in your way, though the timing, dose, and underlying condition all matter for how the pregnancy unfolds.

Why Prednisone Does Not Work Like Birth Control

Prednisone is a synthetic corticosteroid, a medication that tamps down inflammation and modifies immune responses. It is prescribed for a wide range of conditions, from rheumatoid arthritis and lupus to inflammatory bowel disease, asthma flares, and organ transplant maintenance. Because corticosteroids can influence hormones, some women wonder whether the drug might interfere with their ability to conceive. The short answer is that prednisone does not block the hormonal signals that drive ovulation in the way that hormonal contraceptives do.

In fact, research going back decades shows the opposite effect in certain groups. A study of women with excess androgen levels found that prednisone therapy initiated ovulatory activity in about 36% of those who had stopped menstruating entirely and in roughly 91% of those who were menstruating but not ovulating. Among women who were already ovulating, prednisone shortened the first half of the cycle and lengthened the second half, the phase that supports early pregnancy.¹ Those cycle changes suggest the drug can, in some hormonal contexts, make the uterine lining more receptive rather than less.

When Prednisone Is Deliberately Used to Help Women Conceive

It may sound counterintuitive that an immune-suppressing drug would be prescribed to help someone get pregnant, but this is a well-established practice in reproductive medicine. Some women carry autoantibodies or have overactive immune responses that interfere with embryo implantation or early pregnancy survival. For these women, a course of prednisone or a related glucocorticoid can calm the immune environment in the uterus enough to let a pregnancy take hold.

A systematic review pooling data from multiple trials found that glucocorticoid treatment roughly doubled both the clinical pregnancy rate and the live birth rate in women with unexplained positive autoantibodies. The benefit was strongest when the glucocorticoid was started before pregnancy rather than after conception.² Separately, research on women who had experienced repeated implantation failure during IVF found that prednisone shifted the immune balance toward a state more favorable to embryo attachment.³ Another trial in women with autoimmune markers undergoing IVF reported improved implantation rates when prednisolone was combined with low-dose aspirin.⁴

These findings do not mean every woman trying to conceive should take prednisone. The benefits appear specific to women whose immune systems are actively interfering with pregnancy. For someone without those underlying issues, there is no evidence that adding prednisone boosts fertility, and the drug carries its own risks.

What Happens If You Become Pregnant While Already on Prednisone

Many women are already taking prednisone for a chronic condition when they learn they are pregnant. The immediate question is usually whether to stop the drug. The answer depends on what the prednisone is treating. Abruptly stopping a corticosteroid can trigger a disease flare, and uncontrolled autoimmune or inflammatory disease during pregnancy carries its own serious risks, including preterm birth and pregnancy loss. For conditions like lupus or rheumatoid arthritis, doctors often continue prednisone at the lowest effective dose rather than withdraw it entirely.

Prednisone is partially inactivated by an enzyme in the placenta, which means that only a fraction of the maternal dose reaches the fetus. This is one reason it is preferred over some other corticosteroids during pregnancy. Still, at higher doses or with prolonged use, that placental barrier can become overwhelmed, allowing more of the drug to cross.⁵ This is where dose matters enormously. The general principle in obstetric medicine is to use the smallest dose that keeps the underlying disease in check.

Risks to the Pregnancy at Higher Doses

The complications linked to prednisone during pregnancy tend to be dose-dependent, meaning they become more likely as the daily dose climbs. A study of women with lupus found that when the average glucocorticoid dose exceeded about 10 mg per day, the risk of preterm birth rose sharply. Lower average doses were associated with significantly fewer adverse pregnancy outcomes.⁶

Broader population data tell a similar story. Women on long-term steroids face higher rates of several complications:

Preeclampsia: roughly 70% more likely compared with pregnancies without steroid use.
Preterm rupture of membranes: about 60% more likely.
Blood clots: around two and a half times as likely.
Kidney infections: substantially elevated, though uncommon overall.

These figures come from a large cohort study comparing pregnancies with and without long-term corticosteroid exposure.⁷ It is worth noting that the women in the steroid group also had underlying diseases that themselves raise pregnancy risk, so the drug’s contribution cannot be completely separated from the disease’s contribution.

Gestational diabetes is another concern. A prospective study of women taking low-dose prednisone for recurrent miscarriage found that the prednisone group had a higher rate of gestational diabetes and that the drug impaired the body’s ability to handle blood sugar after meals.⁸ Women with a family history of diabetes appear to be at particular risk.

Infection Risk During Pregnancy

Because prednisone dials down the immune system, pregnant women taking it are more vulnerable to infections, and pregnancy itself already involves immune changes that can make infections harder to fight. A large cohort study of pregnant women with autoimmune conditions found a clear dose-response relationship: each additional milligram of daily prednisone was associated with a small but statistically meaningful increase in the risk of serious infection.⁹ “Serious” here means infections that required hospitalization, not ordinary colds. The practical takeaway is the same as with other complications: keeping the dose as low as possible reduces the risk.

The Question of Birth Defects

One of the most anxiety-provoking concerns for any pregnant person on medication is the possibility of birth defects. With prednisone, the specific worry that has received the most research attention is cleft lip, with or without cleft palate. The background rate of this condition is roughly 1.7 per 1,000 live births. A comprehensive review of the evidence concluded that first-trimester corticosteroid exposure may push that number to about 2.7 per 1,000, assuming the association is causal.¹⁰ That is a real increase in relative terms, but the absolute risk remains low. Out of 1,000 women taking corticosteroids during the relevant window, roughly 997 would not have a baby with this particular defect.

The timing matters. The palate forms during the first trimester, so corticosteroid exposure after that period would not be expected to influence cleft risk. Many women who take prednisone for chronic conditions do not begin until the second trimester or later, which sidesteps this particular concern. The review also noted that getting definitive answers is difficult because the studies are small relative to how rare the outcome is, and it is hard to separate the drug’s effects from the effects of the disease being treated.

Effects on the Newborn

When a mother takes prednisone through the later stages of pregnancy, particularly at higher doses, some of the drug reaches the fetus despite the placenta’s protective enzyme. In rare cases, this can suppress the baby’s own adrenal glands, meaning the newborn may not produce enough cortisol on its own after birth. Case reports have documented newborns requiring hydrocortisone treatment after their mothers received high-dose corticosteroids late in pregnancy.¹¹ This is something neonatal teams watch for and can manage effectively if they know about the mother’s medication history.

The longer-term picture is more reassuring. A nationwide cohort study followed children born to mothers with rheumatoid arthritis who took low-dose prednisone during pregnancy and measured their cortisol levels up to about age ten. The researchers found no lasting effect on the children’s adrenal function, concluding that low-dose maternal prednisone use appeared safe for the offspring over that timeframe.¹² This is one area where dose is especially relevant. The reassuring data come from low-dose use; high-dose or prolonged exposure carries more uncertainty.

What If the Male Partner Is Taking Prednisone

Fertility questions tend to focus on the person who will carry the pregnancy, but couples sometimes wonder whether the male partner’s prednisone use could affect conception or the health of a future baby. The picture here is mixed. On one hand, men taking prednisone for inflammatory conditions tend to have lower testosterone levels and mildly elevated levels of hormones that signal the body is compensating for reduced testicular function.¹³ Lower testosterone can translate to lower sex drive and, in theory, reduced sperm production.

On the other hand, when the underlying problem is inflammation in the reproductive tract, prednisone can actually improve sperm quality. One study found that prednisone at various doses improved sperm count and motility in men with low sperm counts linked to inflammatory conditions of the accessory glands.¹⁴ Another study reported dramatic improvements in total motile sperm count in men whose semen quality had deteriorated after vasectomy reversal; a short course of prednisone produced a median improvement of several-fold.¹⁵

So whether a male partner’s prednisone helps or hinders conception depends almost entirely on why he is taking it. If the drug is controlling inflammation that was damaging sperm, it helps. If the drug is lowering testosterone without an offsetting benefit, it could make conception harder. There is no strong evidence that paternal prednisone use at the time of conception causes birth defects or other problems in the offspring.

Breastfeeding While on Prednisone or Related Steroids

After delivery, many women on prednisone want to know whether they can safely breastfeed. Corticosteroids do pass into breast milk, but the amount tends to be low. A study measuring methylprednisolone (a close relative of prednisone) in the breast milk of women receiving high-dose IV pulses for multiple sclerosis found that the transfer was minimal. The researchers concluded that the concentrations were unlikely to pose a threat to the infant, though mothers could wait two to four hours after a dose to further reduce exposure.¹⁶ Most guidelines consider low-to-moderate doses of prednisone compatible with breastfeeding, and waiting a couple of hours after taking the medication provides an additional margin of safety.

The Misconception That Steroids Mean Infertility

A common source of confusion is the tendency to lump all “steroids” together. Anabolic steroids, the kind sometimes misused for muscle building, genuinely do suppress fertility in both men and women by shutting down the body’s reproductive hormone signals. Prednisone is a corticosteroid, which works through entirely different pathways. It does not have the same suppressive effect on the reproductive axis. When people hear “I’m on steroids” and jump to the conclusion that pregnancy is unlikely, they are often confusing these two very different drug classes.

Another misconception is that because prednisone can cause weight gain, mood changes, and other visible side effects, it must also be disrupting reproductive function in obvious ways. In reality, a woman on a stable dose of prednisone for a chronic condition can ovulate normally, conceive without assistance, and carry a pregnancy to term. The drug introduces additional risks that need monitoring, but it does not create a barrier to getting pregnant in the first place.

Balancing Disease Control Against Drug Exposure

The trickiest aspect of prednisone and pregnancy is that the conditions it treats often pose their own risks to a pregnancy. Uncontrolled lupus, severe rheumatoid arthritis, active inflammatory bowel disease, and poorly managed asthma can all lead to preterm birth, growth restriction, or pregnancy loss. Stopping prednisone to avoid drug exposure and then experiencing a disease flare can be worse for the pregnancy than continuing the medication at a reasonable dose.

This is why preconception planning matters so much for women on prednisone. The ideal scenario is to get the underlying disease under good control before conceiving, potentially using steroid-sparing medications that have better safety profiles during pregnancy, and then keeping the prednisone dose as low as possible if it cannot be eliminated entirely. For women with lupus, research suggests that keeping the average daily dose below about 6 to 10 mg significantly reduces the odds of adverse pregnancy outcomes.¹⁷ That number serves as a rough benchmark, though the right dose for any individual depends on her specific disease and clinical situation.

Pregnancies on prednisone are typically managed as higher-risk, with more frequent monitoring of blood pressure, blood sugar, and fetal growth. Women who know they might become pregnant while on prednisone should talk to both their prescribing specialist and an obstetrician before conception, not because the drug prevents pregnancy, but because planning ahead gives the best chance of a healthy outcome for both mother and baby.