This advertisement will appear in Mid December Popular and Women's Weeklies, 1943 and January Monthlies, 1944 To Every Mother of an under-6 The Radio Doctor answers questions vital to your children's welfare 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.