Nebraska Medical Center Study Links Sterol Inhibiting Prenatal Medications to Significant Increase in Autism Spectrum Disorder Risk

UNMC researchers find that common medications like antidepressants and beta blockers taken during pregnancy may increase autism risk in children.

By: AXL Media

Published: Apr 20, 2026, 9:41 AM EDT

Source: Information for this report was sourced from EurekAlert!

A Massive Data Analysis of Maternal Health Records

A landmark investigation led by researchers at the University of Nebraska Medical Center has uncovered a concerning correlation between certain prenatal prescriptions and neurodevelopmental outcomes. By examining over 6 million records from the Epic Cosmos database, which represents nearly a third of all U.S. births between 2014 and 2023, the team identified a persistent link between sterol biosynthesis inhibiting medications (SBIMs) and autism spectrum disorder (ASD). According to the study, this association remained consistent across a vast demographic, signaling a potential environmental factor in rising neurodevelopmental diagnoses.

The Cumulative Risk of Multiple Medication Exposures

The findings indicate that the danger to fetal development increases significantly based on the number of medications a mother is prescribed. Mothers taking at least one SBIM faced a 1.47 fold higher risk of having a child diagnosed with ASD, but this figure climbed sharply with additional prescriptions. For every extra SBIM co-prescribed, the risk factor increased by 1.33 times, eventually reaching a 2.33 fold risk for children whose mothers were prescribed four or more such medications simultaneously. This dose dependent relationship suggests that the cumulative chemical impact on the womb may be a critical driver of vulnerability.

Critical Role of Cholesterol in Fetal Brain Development

The biological rationale for these findings centers on the essential nature of cholesterol for the developing brain, which is the most cholesterol rich organ in the human body. While the fetal brain begins producing its own sterols around the 19th or 20th week of pregnancy, many common medications can unintentionally disrupt this pathway. The researchers noted that genetic interference in this same system already causes severe syndromes where a majority of children meet ASD criteria. This study marks the first time a nationwide effort has been made to quantify the impact of widely used drugs like statins, beta blockers, and antipsychotics on this specific biosynthetic process.