I've spotted before my period for as long as I can remember. Until a few days ago I'd never heard of this being a sign of low progesterone. I've TTC for 8.5 years with one partner (only one very early miscarriage in that relationship) and 9 months with my current partner (just miscarried at 6 weeks) so I'm now thinking this could be my problem so I'll be asking my doc about this when I go back for blood test results on Friday.