Does abnormality during pregnancy cause multiple sclerosis?
Patient: Suppose someone argued that the reason twins often share multiple sclerosis is not because it’s hereditary, but because of some abnormality in the mother’s pregnancy such as maternal exposure to a toxin or virus. What argument could you give against this hypothesis? Doctor: I don't think so. MS is acquired primary demylination of central nervous system. Environmental factors do play role in its caution eq it's more common in western countries with low sunlight than India. Some other unknown factors including viruses also play role.