Microplastics, which are less than 5 millimeters, and nanoplastics, which are invisible to the naked eye, are widespread throughout our environment. Research has shown exposure to plastics in general is harmful to both the environment and humans. Now, researchers will unveil findings that suggest microplastics and nanoplastics have been found in higher concentrations in the placentas of infants born prematurely compared to those born at term. Researchers used highly sensitive mass spectrometry to analyze 175 placentas; 100 placentas collected at term and 75 collected preterm (less than 37 weeks of pregnancy). "Advanced technology now enables us to accurately measure microplastics...