'Nature' is commonly understood as, among other things, standing in contrast to the 'man-made'. However, can these two ideas be kept separate? Surely everything 'man-made' cannot occur contrary to the fundamental structure of the universe and does not oppose it, but rather occurs within it and perhaps even as a factor of the natural constitution of humankind?
Or to put it more simply: surely there is nothing 'unnatural' about (for example) a parent deciding upon the genetic make-up of their as yet unborn child, despite this being to many peoples' distaste.