According to a study published July 14 in the journal Environmental Pollution, exposure to glyphosate during midpregnancy increases the likelihood of spontaneous preterm birth before 37 weeks. Led by researchers at NYU Langone Health and analyzing 1,450 women, the investigation found that higher urinary concentrations of the active chemical ingredient in professional-grade Roundup products specifically tied to early labor, though everyday food and environmental traces remain widespread across the United States.
Glyphosate Exposure Levels and Preterm Birth Risks
Women with higher levels of glyphosate in urine samples collected between 18 and 25 weeks of pregnancy faced a greater chance of spontaneous labor before 37 weeks, according to data from the Children’s Health and Environment Study. Researchers tracked families delivering at NYU Langone-affiliated hospitals in New York City between 2016 and 2019. Participants provided urine samples twice during gestation: once between four and 17 weeks, and a second time during the middle months. Statistical models accounted for maternal age, previous pregnancy experiences, and education levels.
This risk pattern did not appear when the chemical was measured during the first few months of pregnancy. Furthermore, the investigation found no statistical connection between the herbicide and medically induced early births resulting from conditions like preeclampsia or poor fetal growth. According to study lead author Teresa Herrera, an MPH and doctoral candidate in the Department of Population Health at NYU Grossman School of Medicine, these results build on understanding how early-life chemical exposures impact lifelong health.
Did You Know?
Data from the Centers for Disease Control and Prevention indicates that more than 80 percent of Americans likely carry detectable levels of glyphosate in their urine. The chemical is sprayed commercially on food crops like grains and legumes, as well as on residential gardens, leaving residues in cereals, snack foods, and fresh produce.
Biological Mechanisms and Potential Inflammatory Triggers
Laboratory evaluations involving animals and cells suggest that glyphosate might activate inflammatory pathways capable of triggering early labor, according to researchers. While past scientific inquiries focused heavily on farmworkers and non-Hodgkin lymphoma risks from heavy exposure, fewer investigations have examined everyday dietary and environmental contact during gestation. According to Herrera, earlier human studies were often small or inconsistent and rarely measured the herbicide at multiple temporal points.
Preterm birth remains a primary driver of infant illness and mortality. Premature infants face elevated dangers of respiratory complications, severe infections, and long-term developmental and learning hurdles. By isolating spontaneous early deliveries from those prompted by clinicians, the NYU Langone team determined that the chemical’s statistical association aligns more closely with spontaneous labor catalysts like inflammation rather than clinical complications requiring early surgical intervention.
Regulatory Calls and Practical Guidance for Expectant Families
Because glyphosate contamination is pervasive in the environment, individual dietary changes alone cannot eliminate exposure entirely, according to Herrera. However, families seeking to lower their intake can choose organic produce and grains when feasible and consult healthcare providers with specific concerns. Study senior author Leonardo Trasande, MD, MPP, emphasized that organic farming methods maintain competitive agricultural yields, meaning the balance between weed control and long-term health risks warrants reevaluation.
Pro Tip:
Expectant parents concerned about environmental chemical exposures should discuss personalized reduction strategies and dietary choices directly with their obstetricians or pediatric care providers.
Dr. Trasande, who serves as the Jim G. Hendrick, MD, Professor of Pediatrics at NYU Grossman School of Medicine and directs the Division of Environmental Pediatrics, noted that the observational analysis cannot establish definitive causation between glyphosate and preterm birth. Funding for the research was supplied by National Institutes of Health grants R01ES032214 and ES036249. The research team’s upcoming projects will investigate the specific biological mechanisms through which the herbicide influences fetal development.
Frequently Asked Questions
What is glyphosate?
Glyphosate is the active chemical ingredient utilized in professional-grade Roundup products, commonly sprayed on commercial food crops such as grains and legumes and on residential gardens.
How was the study conducted?
Researchers examined data from 1,450 women participating in the Children’s Health and Environment Study who delivered at NYU Langone-affiliated hospitals between 2016 and 2019, analyzing urine samples collected at two distinct points during pregnancy alongside medical records.
Does exposure guarantee a preterm birth?
No. Study authors emphasize that the findings show a statistical association between higher midpregnancy urine levels and spontaneous preterm labor, but the analysis cannot prove direct causation.
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