Hi, I already have 2 x frozen embryos and have just started taking drugs for hopefully having one transferred this cycle. 2nd day of my cycle and did a cetrimide injection tonight. That was so difficult! I couldn't get the stuff out of the vial into the injection, kept leaving some behind. I kept squirting it back and starting again. Eventually got most of it back in and injected it. All good except a big red mark on my tummy! Any tips for getting all the liquid back in after mixing it? I am also taking 3 x HRT tablets a day (forget the name) I also don't really understand what these drugs are actually doing, assume it's to make the womb lining right for the transfer? Good luck everyone!