For me, I make sure I take it really close to the same time, and my temps stay fairly close, even though I am nursing basically frmo 12 on. BUT I am in bed for 3 hours(usually) and just kinda cosleeping once he wakes. I've noticed much more of a change if I take it earlier or later, than if I have been up or not(usually no change if I get up and go potty and try again LOL, as long as its the same time in the morning, though I try not to do it if I don't have too) HTH!

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