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Pregnancy may increase risk of mental illness in people with MS

2025-01-22
(Press-News.org) MINNEAPOLIS — Pregnant people with multiple sclerosis (MS) have a higher chance of experiencing mental illness both during their pregnancy and in the first years after they give birth than those without MS, according to a study published in the January 22, 2025 online issue of Neurology®, the medical journal of the American Academy of Neurology.

“Previous studies have shown that women with MS are more likely to have depression, anxiety disorders and bipolar disorder compared to women without MS,” said study author Ruth Ann Marrie, MD, PhD, of Dalhousie University in Halifax, Canada, and member of the American Academy of Neurology. “Mental health struggles can affect both parents and kids, making it important to understand how mental health challenges around pregnancy affect people with MS.”

The study involved 894,852 pregnant people. Of the group, 1,745 people had MS, 5,954 people had epilepsy, 4,924 people had irritable bowel disease, and 13,002 people had diabetes. They were matched to 869,227 pregnant people who did not have MS or any of the other conditions.

Researchers looked at health records for people who gave birth during a 15-year span. They looked at records from two years before conception to three years after the participants gave birth.

Researchers then looked at how many participants had newly diagnosed or existing mental illness during pregnancy, and in the first, second and third years after giving birth. Mental illnesses included anxiety, depression, bipolar disorder, psychosis, suicide attempts and substance abuse.

They found that mental illness affected 42% of people with MS during pregnancy and increased to 50% in the first year after giving birth, compared to 30% of people without MS during pregnancy and 38% in the first year after birth.

A total of 8% of people with MS had new mental illness diagnoses during pregnancy and 14% had new diagnoses in the first year after birth, compared to 7% and 11% of those without MS.  

After adjusting for factors such as age at conception and income in the area of residence, researchers found that pregnant people with MS had a 26% increased risk of mental illness during pregnancy and a 33% increased risk after giving birth when compared to pregnant people without MS.

In addition, researchers found that people with MS had an increased risk of all specific mental illnesses except suicide attempts. They also found that substance use increased in people with MS from 0.54% during pregnancy to 6% after giving birth.

“These findings emphasize the need for preventive and early treatment of mental illness,” said Marrie. “Future studies should look at how MS affects mental health in mothers during and after pregnancy and if it’s worse in different stages of MS. Doctors should know about these risks, make sure to check mental health, and provide treatment if needed.”

A limitation of the study was that researchers were unable to look at how severe participants’ MS was, what treatments people were using or their health habits.

The study was supported by MS Canada and ICES, formerly the Institute for Clinical Evaluative Sciences.

Discover more about MS at BrainandLife.org, from the American Academy of Neurology. This resource also offers a magazine, podcast, and books that connect patients, caregivers and anyone interested in brain health with the most trusted information, straight from the world’s leading experts in brain health. Follow Brain & Life® on Facebook, X, and Instagram.

The American Academy of Neurology is the leading voice in brain health. As the world’s largest association of neurologists and neuroscience professionals with more than 40,000 members, the AAN provides access to the latest news, science and research affecting neurology for patients, caregivers, physicians and professionals alike. The AAN’s mission is to enhance member career fulfillment and promote brain health for all. A neurologist is a doctor who specializes in the diagnosis, care and treatment of brain, spinal cord and nervous system diseases such as Alzheimer's disease, stroke, concussion, epilepsy, Parkinson's disease, multiple sclerosis, headache and migraine.

Explore the latest in neurological disease and brain health, from the minds at the AAN at AAN.com or find us on Facebook, X, Instagram, LinkedIn, and YouTube.

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[Press-News.org] Pregnancy may increase risk of mental illness in people with MS