Credit Sarah Hopkins / Creative Commons http://michrad.io/1LXrdJM The chemical in question is glyphosate which used in herbicides such as Roundup. “We found that women that had detectable levels of glyphosate and its environmental breakdown product AMPA (aminomethylphosphonic acid) in their urine around the 26th week of pregnancy had an increased risk for preterm births,” said Monica Silver, lead author of the study published in the journal Environmental Health Perspectives. If glyphosate was found, the women ran a 35% increased chance of a preterm birth. “And women who had exposures to the breakdown product, AMPA, had an even higher 67% increased risk of preterm birth," Silver said.