well, sub q at first sounds kind of painful and freaky, but my doc gave me those slin pins (super tiny needles!) and told me to pinch the fat near the belly button and while pinching it, put the needle into the raised portion of the skin. I haven't felt any pain yet from it. I have done it 3 times now and i realize why he recommends sub q verses im. I can't imagine shooting hcg with a 25 gauge pin, that sounds 2 painful. I don't know what gauge these slins are but they are definitely tiny compaired to a 25.. remember, pinch, jab, push. and your done