 [ Symptoms ] my baby is arms measure 7 weeks behind and her legs 2 weeks behind [ Disease ] this could intrauterine growth retardation which has many causes from malnutrition to genetic defect if other organs are fine you should make sure of your gestational date as it may be inaccurate depending on the cause one of the following treatment options may be useful increasing your nutrient intake this ensures that your fetus is getting adequate food if you have not been eating enough your baby may not have enough nutrients to grow bed rest feel better soon