Can anyone offer advice on progesterone. I know the injections are gold standard at cfc but the last 2 times i used them i had a severe reaction and on the second transfer it got to the point were my butt was as hard as a rock, red, hot and extremely painful. Walking was an issue too. The nurse has said this time i will use crinone. Has anyone else used this and had a possitive outcome? Does anyone know if you can alternate between injections and suppositories or is it better to stick to the same thing continuously? Thanks in advance and good luck to all.