No one knows when Russell Silver Syndrome developed but it is caused by a copy of the seventh chromosome. People usually get the copy from their mother. Russel Silver syndrome is a TREATABLE form of dwarfism. This is treated with the write diet

My son has Russell-Silver Syndrome....It has NOTHING to do with the amount of fluid around the baby. It is a form a Primordial Dwarfism, meaning, that the baby was conceived that way. It is definitely something genetic, but it's exact genetic cause or marker is not yet known.

it depends on which gender has dwarfism so if the women has dwarfism the she could have a baby that has dwarfism

David Riley Russell has written:

'The silver fawn'

There is no treatment for dwarfism. It is permanent.