Title: Motor vehicle emissions and pregnancy
Content: exposure to particulate matter during the initial first weeks of their pregnancy resulted in low birth weight babies This toxin is also considered to be the most dangerous of the three because it can be basically anything small enough to be inhaled. This may also be due to the fact that brain growth begins within the first month of conception. A previous study conducted in the Los Angeles Basin of Southern California reported a consistent association between levels of CO and particulate matter during the first trimester and the last six weeks prior to birth and risk of preterm birth.

Title: Environmental toxicants and fetal development
Content: include changes in liver function, thyroid hormone levels, white blood cell levels, and decreased performance in tests of learning and intelligence. Air pollution can negatively affect a pregnancy resulting in higher rates of preterm births, growth restriction, and heart and lung problems in the infant. Compounds such as carbon monoxide, sulfur dioxide and nitrogen dioxide all have the potential to cause serious damage when inhaled by an expecting mother. Low birth weight, preterm birth, intrauterine growth retardation, and congenital abnormalities have all been found to be associated with fetal exposure to air pollution. Although pollution can be found virtually everywhere,

Title: Motor vehicle emissions and pregnancy
Content: are known to also have specific adverse effects on expectant mothers and their fetuses. The purpose of this article is to outline how vehicular pollutants affect the health of expectant mothers and the adverse health effects these exposure have on the unborn babies. In Los Angeles County, researchers found a higher risk in premature birth (10-20%) and low birth weight for infants whose mothers lived near high traffic areas Studies conducted on populations living near the 405 and 710 interstates in Southern California found their exposure to particulate vehicle emissions to be almost 25 times higher than for people living

Title: Nitrate
Content: be at risk. Pregnant women show a decrease in methemoglobin levels with increasing gestation. Exposure to nitrate in groundwater during pregnancy at concentrations above the MCL was associated with increased risk for anencephaly. A study done in Texas and Iowa found that mothers of babies with spina bifida were twice as likely to ingest 5 mg or more of nitrate daily from drinking water as mothers of babies without major birth defects. Mothers of babies with limb deficiencies, cleft palate, and cleft lip were, respectively, 1.8, 1.9 and 1.8 times more likely to ingest 5.42 mg or more of nitrate

Title: Birth defect
Content: nitrates, nitrites, fluoride can be carried through water and cause congenital disorders. Nitrate, which is found mostly in drinking water from ground sources, is a powerful teratogen. A case-control study in rural Australia that was conducted following frequent reports of prenatal mortality and congenital malformations found that those who drank the nitrate-infected groundwater, as opposed to rain water, ran the risk of giving birth to children with central nervous system disorders, muscoskeletal defects, and cardiac defects. Chlorinated and aromatic solvents such as benzene and trichloroethylene sometimes enter the water supply due to oversights in waste disposal. A case-control study on

Question: Which common water pollutant is believed to be harmful to newborn babies?
Answer: Nitrate