What are the indicators of nutritional risk in pregnancy in a client who is of normal weight?

The indicators of nutritional risk in pregnancy in a client who is of normal weight are; smoker, Twin gestation, and also term delivery 2 years ago . Smokers usually have a nutrient-poor diet and are at risk of continuing the same diet during pregnancy. Multifetal pregnancies require nutrition above the normal requirements for pregnancy. 

If enough evidence accumulates to support a hypothesis it moves to the next step known as a theory