Higher glyphosate exposure during midpregnancy is associated with an increased risk for spontaneous preterm birth, according to a longitudinal cohort study published in Environmental Pollution. The research, which analyzed data from 1,450 pregnant women, identifies a potentially vulnerable midpregnancy window of susceptibility for exposure to the widely used herbicide.
Glyphosate Concentration and Spontaneous Preterm Birth Risk
Researchers examined data from women enrolled in the Children’s Health and Environment Study who delivered at NYU Langone-affiliated hospitals in New York City between 2016 and 2019. According to the study findings, women with higher urinary glyphosate levels during midpregnancy experienced a higher likelihood of spontaneous labor before 37 weeks of gestation compared to those with lower exposure.
Urine samples in the cohort were collected across two distinct periods: early pregnancy (4 to 17 weeks) and midpregnancy (18 to 25 weeks). Medical records were subsequently reviewed to determine gestational age at delivery and to differentiate between spontaneous preterm births and medically indicated deliveries.
Did you know? The study found that glyphosate concentrations measured during early pregnancy showed no association with preterm birth risks, pointing specifically to the 18-to-25-week window as a critical period.
Early Versus Midpregnancy Exposure Differences
The timing of exposure plays a critical role in the observed health outcomes. While midpregnancy measurements revealed a clear link to spontaneous preterm delivery, early pregnancy biomarker concentrations did not correlate with shortened gestational age.
Furthermore, researchers reported no relationship between glyphosate exposure and medically indicated preterm deliveries. These medically induced births typically result from specific clinical conditions such as preeclampsia or fetal growth restriction, distinguishing them from spontaneous labor events.
Frequently Asked Questions
What is glyphosate?
Glyphosate is a widely used herbicide.
Which pregnancy window showed increased risk in the study?
According to the Environmental Pollution study, higher glyphosate exposure during midpregnancy (18 to 25 weeks) was associated with spontaneous preterm birth.
Were early pregnancy exposures linked to preterm birth?
No, glyphosate concentrations measured during early pregnancy (4 to 17 weeks) were not associated with preterm birth outcomes in this cohort.
What are your thoughts on environmental exposure studies during pregnancy? Share your perspective in the comments below, and explore our health news section for more updates on clinical research.
Worth a look