Fluctuate ??
Yes, it drives me NUTS!
I was reading about this just yesterday.
"Keep in mind what the scale can and can't do. Remember that normal and significant fluctuations can occur through water retention, water loss, glycogen storage, changes in body mass, and the normal ebb and flow of fluids."
Full article talks about 'the scale':
If I had plotted my daily weight the whole time I lost my weight the trend would have looked more like a slowly downward progressing heartbeat! It still does... often I go up, down, up down.. then the up is slightly lower... then the down is slightly lower.. then gradually I realise I have lost weight.
Oh, and about 'that time of the month'- well I may as well strap a suckling pig to my back before getting on the scales.
I know it can seem discouraging, but let me assure you that I was exactly the same and I lost my weight- fluctuations are normal.
Em