Can Stress Cause a Miscarriage? What Evidence Shows
Can Stress Cause a Miscarriage?
Research shows a link between high or chronic psychological stress and a modestly increased risk of miscarriage, but everyday stress from work, deadlines, or normal life worries has not been shown to cause pregnancy loss. Most miscarriages happen because of chromosomal abnormalities in the embryo, a cause entirely unrelated to a parent's stress level or mindset.
That distinction matters, because "stress causes miscarriage" gets repeated so often that many people accept it as settled fact. The research is more nuanced, and more reassuring, than the common version of the claim.
What Does the Research Say About Stress and Miscarriage Risk?
A widely cited 2017 systematic review and meta-analysis, published in Scientific Reports, pooled multiple studies and found that women who reported psychological stress were more likely to miscarry than those who did not. Stress and miscarriage risk appeared elevated even after researchers adjusted for study type: one analysis found roughly a 42% higher likelihood of miscarriage among women reporting general psychological stress, and a smaller, roughly 27% increase associated specifically with work-related stress.
The American Society for Reproductive Medicine (ASRM) references this body of research in its committee opinion on recurrent pregnancy loss and recommends psychological support for couples navigating pregnancy loss. Importantly, an association found in observational research is not the same as proof that stress directly causes miscarriage. People experiencing early pregnancy symptoms, financial strain, or health problems may also be more stressed and more likely to miscarry for unrelated reasons, which makes the relationship difficult to fully untangle.
Most of these studies also rely on people recalling and self-reporting their stress levels, often after a pregnancy loss has already happened. That creates room for recall bias: someone who has just miscarried may look back and rate the weeks beforehand as more stressful than they would have described them in real time. Researchers account for this where possible, but it's one reason the field describes these findings as an association worth continued study, rather than a settled cause-and-effect relationship.
Is "Stress Causes Miscarriage" a Myth?
It's not entirely a myth, but it's often overstated. Whether is miscarriage caused by stress a myth is the wrong question, since the evidence points somewhere in between: short-term, everyday stress, a stressful commute, a work deadline, an argument, has not been linked to pregnancy loss. The research pointing to increased risk focuses on chronic, sustained, or severe psychological stress, not the ordinary ups and downs of daily life.
This distinction matters because the exaggerated version of this claim causes real harm. People who miscarry often blame themselves for being too stressed, too busy, or too anxious during pregnancy, when the evidence does not support that kind of self-blame in the vast majority of cases. Miscarriage rates run around 10 to 15% of clinically recognized pregnancies, and the leading cause by far is chromosomal, not emotional.
Does Cortisol Play a Role in Miscarriage?
Cortisol, the body's main stress hormone, is often raised as a possible mechanism connecting cortisol and miscarriage. The theory is that chronically elevated cortisol, part of the body's hypothalamic-pituitary-adrenal (HPA) stress response, could affect the uterine environment or immune function in ways that make pregnancy loss more likely. This mechanism is biologically plausible and has been studied in animal models, but human evidence remains limited and inconsistent, and no reliable cortisol threshold has been identified that predicts miscarriage risk in people. Anyone citing a specific cortisol cutoff as a miscarriage predictor is going beyond what the current research actually supports.
Some small studies have measured cortisol in saliva or blood during early pregnancy and compared levels between people who later miscarried and those who did not, with mixed results. Cortisol naturally rises across pregnancy as part of normal physiology, which makes isolating "too much stress hormone" from "normal pregnancy hormone changes" genuinely difficult with current testing methods.
Can Anxiety Cause a Miscarriage?
Can anxiety cause a miscarriage is a related but distinct question from everyday stress. Clinically significant, chronic anxiety may overlap with the kind of sustained stress response studied in the research above, but having anxious thoughts during pregnancy, which is extremely common, is not the same as having a diagnosed anxiety disorder driving a prolonged stress response. Occasional worry about the pregnancy itself does not appear to raise miscarriage risk, and worrying about whether you're too worried tends to make the experience of pregnancy harder without changing the medical outcome.
Anxiety after a pregnancy loss is also common and deserves its own attention, separate from the question of what caused the miscarriage. Feeling anxious during a subsequent pregnancy, sometimes called pregnancy-after-loss anxiety, is a recognized experience that a therapist or ob-gyn can help manage, and seeking that support is not a sign of doing pregnancy "wrong."
How Can You Manage Stress During Pregnancy?
Whether or not stress directly affects miscarriage risk, reducing unnecessary stress supports overall wellbeing during pregnancy, and that's reason enough to prioritize it. Stress management during pregnancy doesn't require an overhaul of daily life.
- Keep prenatal appointments so questions get answered instead of researched alone at midnight
- Build in consistent sleep, gentle movement, and time away from screens
- Talk to a therapist or counselor if worry feels constant or hard to manage
- Lean on a partner, friend, or support group rather than carrying concerns alone
- Limit time spent in online spaces that amplify worst-case scenarios
Mental health support during pregnancy is considered part of routine prenatal care by major health organizations, not a separate or optional add-on, so it's worth raising with a provider directly rather than managing alone. Screening for depression and anxiety is now a standard part of prenatal visits in many practices, precisely because emotional wellbeing affects how someone experiences pregnancy, even where it doesn't change the biological outcome.
Practical stress reduction also looks different for everyone. Some people find structured approaches like prenatal yoga or guided breathing genuinely calming, while others do better with something as simple as a consistent walk or an hour with no phone notifications. There's no single correct method, only the ones that actually get used consistently.
Bottom Line
The honest answer sits between two extremes. Stress does not cause miscarriage in the way a chromosomal abnormality does, and everyday stress from work or daily life is not a proven risk factor on its own. At the same time, research does associate chronic, severe psychological stress with a modestly elevated risk, which is worth acknowledging rather than dismissing outright. If you've experienced a miscarriage, it was almost certainly not caused by being stressed, and that's worth repeating as many times as it takes to actually believe it.
If you're trying to conceive again after a loss, it's reasonable to want to manage stress better this time, not because it guarantees a different outcome, but because pregnancy is easier to go through when you feel supported. That's a good enough reason on its own, without needing stress to be the cause of what happened before.
For a broader look at what to watch during early pregnancy, see our guide on what to avoid during early pregnancy. And if you're preparing to try again, our guide on how often to have sex when trying to conceive can help with timing.
This article is for general informational purposes only and is not medical advice. It is not intended to diagnose, treat, cure, or prevent any condition. If you have concerns about your fertility, please consult a qualified healthcare provider.