Are there practical ways to reduce the odds of inherited metabolic disorders in fetus?

Genetic testing: Genetic testing can be done for many metabolic disorders pre-pregnancy to minimize one's risk of occurance.

Screening: The most practical way to reduce the risk of a metabolic disorder in the fetus is to screen mom and dad. Genetic screening of mom and dad tells whether you by chance carry a mutation for a metabolic disorder and are at risk for a metabolic disorder in the fetus. Screening recently has become more available and lower in cost.