I need to lose 50 pounds to be in the high end of normal weight. I do not plan to lose all of that during pregnancy, but wouldn't mind losing some or at least maintaining. What are some thoughts on this? Btw, I've been on the board before but it has bee awhile. Thanks for any advice. Btw, I'm 41 yrs old, if that matters and I don't have ny known health issues other than weight.