ArticleInternational journal of hygiene and environmental health2026
Associations of glyphosate and aminomethylphosphonic acid (AMPA) concentrations with birth outcomes in pregnant women from the Midwestern U.S.
Article in International journal of hygiene and environmental health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundPregnant women are ubiquitously exposed to the herbicide glyphosate and its major metabolite aminomethylphosphonic acid (AMPA). Therefore, we examined associations of glyphosate and AMPA with birth outcomes.
methodsPregnant women from the Illinois Kids Development Study (I-KIDS) participating in this pilot study (n = 300) provided first-morning urine samples at median 13-weeks gestation for glyphosate and AMPA measurement. We calculated gestational-age-at-birth using the last menstrual period after ultrasound confirmation, abstracted birthweight from electronic medical records, and calculated sex-specific birthweight-for-gestational-age z-scores (BWz). We measured birth length (cm) and anogenital distance (AGD) within 24 h of birth and calculated the anogenital index (AGI, mm/m) by dividing each AGD value (in mm) by the body length (in m). Multivariable linear regression models evaluated associations of glyphosate or AMPA with birth outcomes and differences in associations by newborn sex.
resultsIn all newborns, only 2-fold higher AMPA was associated with -0.07 cm shorter birth length (95 %CI: -0.16, 0.02). In males, each 2-fold higher glyphosate was associated with -0.06 lower BWz (95 % CI: -0.13, 0.01), -0.14 cm shorter birth length (95 %CI: -0.31, 0.04), and 0.63 longer AGI
conclusionsGlyphosate or AMPA were associated with smaller birth size and longer AGI
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