In fact, it is not just the mother’s current health status that affects children but rather the longstanding maternal health represented by the mother’s own low birth-weight, which is associated with a higher probability of her children experiencing low birth weight (Currie and Moretti, 2007). Currie and Moretti (2007) estimate an average intergenerational correlation of 0.17, meaning that a 100 g increase in the birth weight of a mother is associated with a 17 g increase in the birth weight of her children. Trying to quantify the impact of health at birth on adult outcomes, the estimates in Black, Devereux and Salvanes (2005) suggest that a 7.5% increase in birth weight would lead to a 1.1% increase in the birth weight of a person’s children in Norway.