Yeah I agree. I have a very physical job with heaps of lifting & restraining animals and sometimes I just "know" that it is too much for my body. When I was pregnant with Matilda I was sitting on top of large rottweilers worried about what would happen if I fell off while we were trying to do something. BUT I think you have to be the one to judge what your body is capable to handling. In one sense you can't predetermine whether or not you will m/c. But in another you do need to protect your babies life & yours