english: In a study published in December 2014, Marc Weisskopf, Harvard T.H. Chan School of Public Health associate professor of environmental and occupational epidemiology, and colleagues looked at children whose mothers were exposed to high levels of fine particulate matter (PM2.5, particles 2.5 microns in diameter or smaller), particularly during the third trimester of pregnancy.
non_english: Dalam sebuah studi yang diterbitkan pada Desember 2014, Marc Weisskopf, seorang associate professor Epidemiologi Profesi dan Lingkungan dari Harvard T.H. Chan School of Public Health, beserta rekan-rekannya meneliti anak-anak yang ibunya pernah terpapar materi partikulat halus (PM2,5; partikel yang berukuran diameter 2,5 mikron atau lebih kecil) dalam kadar yang tinggi, terutama selama masa kehamilan trimester ketiga.