We had that in our family over the past few years. As soon as a pregnancy was announced in a grandchild, we'd lose a grandparent. My grandfather was one of 12 and it seemed that it was happening constantly there, we lost him also as soon as his first great grandchild was announced. It didn't happen exactly like that with me, but when I fell pg the first time, my nan was diagnosed with cancer just before that. I m/c, she was given the all clear. I fell pg again, and ten months after DD was born, my nan died. I hate things like this, I know how you feel