References Flegal KM, Kit BK, Orpana H, Graubard BI (2013) Association of all-cause mortality with overweight and obesity using standard body mass index categories: a systematic review and meta-analysis
Methods A comprehensive literature review was conducted using the most accurate scientific databases, e.g., PubMed, Scopus, and Web of Science, applying effective, characteristic, and relevant keywords such as drugs, chemicals, placenta, fetotoxicity, pregnancy, placental transfer, placental metabolism, gestation, pollutants, placental barrier, in vitro studies, in vivo animal studies, ex vivo studies, etc
Those molecules are often referred to as free radicals or reactive oxygen species
Research identifies seven primary categories of triggers: 1