Environmental factors like air pollution and sunlight have long term health impacts on a fetus. Lack of sunlight might be countered by adequate prenatal vitamin D supplements.
… the study found that mothers who were exposed to low levels of sunlight during the third trimester of pregnancy had babies with an increased lifetime risk of type 2 diabetes. A mother's increased exposure to fine air particulates during the first trimester was associated with her child's increased risk of atrial fibrillation … mothers who received higher doses of carbon monoxide, which varies depending on the location, during the first trimester had babies with an increased risk of depression and anxiety.
…"For example, a mother's exposure to fine air particulates raises her risk for high blood pressure, which is associated with high blood pressure in the offspring. And high blood pressure, in turn, is associated with an increased risk of atrial fibrillation.
… children who were younger than their peers at the time they were enrolled in school had a higher risk of ADHD, with an 18 percent difference in risk between the youngest and oldest children.