What is the best baseline estrogen level during ivf?

I would ask yr doc. Ivf can be stressful and there is an inclination to get obsessed with details. I'm not saying that's you and it is important to be informed. It sounds like you need reassurance of your level but there can be some fluctuations and i'm not sure there is a best level. It is likely a range and one reason to check it is so that it isnt too high, pointing to ovarian hyper stimulation. Good luck.