I am not pregnant nor have I been, but I have been on desmethasone.  The only suggestion for the medicine, is that I blew up like a water balloon.  My Endo put me on a water pill and it seems to be working.  However, I know that you are not to take water pills while pregnant (from my Gyno).  Therefore, my Endo switched me to Prednisone and it seems to working for me. 

Just thought you would want to know.