According to the article, which of the following is TRUE regarding maternal stress during pregnancy?
1) Maternal prenatal stress can impact her offspring's development beyond infancy and into adulthood.
2) Maternal prenatal stress has the potential to cause physiological problems, but not cognitive issues.
3) Maternal stress reduction is only effective among women experiencing low to moderate levels of stress.
4) The consequences of maternal stress can be narrowed to a single effect of stress.