Ferguson was appointed to the faculty at the
National Institute of Environmental Health Sciences in 2015. She studies how exposure to chemicals in common consumer products impacts
prenatal development. She has shown that these chemicals can cross placental and
blood–brain barriers. She showed that phthalates, plasticizers found in commercial products (e.g. shampoos, soaps) impact birth outcomes. She has studied
oxidative stress – imbalances between reactive and antioxidant oxygen species. Exercise can result in elevated levels of oxidative stress and antioxidant capacity describes how people respond to it. Ferguson believes that higher levels of phthalates and emotional stress during pregnancy elevates oxidative stress. To evaluate mixtures of chemicals, Ferguson developed an analytical method called "quantile g-computation,". ==Awards and honors==