For example, fetuses who have Fetal Alcohol syndrome develop different types of facial abnormalities and facial deformities. So physical deformities, they have problem with growth and developing properly. They have problems with their essential nervous system. So the brain and the spinal cord, they also have a variety of different types of learning disabilities and physical disabilities. So alcohol, recreational drugs, medicinal drugs, smoking all these things are really bad not only for that mother, but these effects are amplified and are really bad for that developing fetus. Now, let's move on to pathogens.