Gotta be honest, I have no idea how to palpate for follicles. She looks way bigger and she's been lying inverted every once in a while.
I stopped pairing everyone end of April (just to be methodical & because all the other girls stopped feeding, got huge, etc.). But the thought has occurred to me to pair her up a few more times to be on the safe side...I just might do that. I really wanted a Mojave Spider (or Spider Mojave).
Ralph Davis has some great videos on palpating. Once you feel them for the first time, it's hard to mistake. They are like a string of pearls when small, and you will feel them get larger and larger over a period of time.