What causes breast tenderness 7-9 DPO?

[ticklish]

For me, I think it is a combination of progesterone levels and fluid retention before AF arrives causing bb pain before AF.
TICKLISH

[gurnz]

Hi Darily,

I also get this - in fact, I have it right now and I'm on CD28. I get them quite sore underneath around the sides. I don't like it because it makes me also think they are getting heavy and I could get a BFP.....