FOOD FACTS 269 Nations out of Nurseries The Radio Doctor answers questions from mothers of children up to five Q. I hear a lot about rickets. How can I prevent my unborn baby from having this disease? A. With cod-liver oil available for every expectant mother and young child in the country there shouldn't be a single case of rickets. Expectant mothers need the Vitamin D contained in cod-liver oil because they are at work on a new human body, the body of the child. Get fish-liver oil tablets—they're easily swallowed—from your clinic or welfare centre.