Any health concerns with water soluble oils?

I have used acrylic paints for years and have been successful but I have recently switched to the new water soluable oil paints. Now I am considering getting pregnant and would like to know if there are any health concerns with this type paint. Should I go back to acrylics? Also, how do you varnish with this type of oil paint? I would like to get some opinions of what people think of this medium.