Intermittent fasting and ttc

Hi! I’m struggling to get some concrete info on intermittent fasting (in particular Fast 800) and ttc. I’ve only been doing it a week and so far it really works for me. I have just over a stone to lose. But I’m scared to do anything that will impact my hormones in anyway, seeing as regular cycles are the one thing I have going for me! Has anyone tried this? Anyone been told explicitly not to do this when ttc? I have my appointment on Monday to discuss IVF 😬