E2:Progesterone level

OK...this is my 8th attempt at IVF. I had a cryotransfer of 3 embryos on 11/4. I went for bw today showing E2 240 and Progesterone 28.0 What should they be? Is there a ratio of E2 to Progesterone? How does my RE know when to increase or decrease the medication. I guess what I'm looking for is some kind of formula that can tell me if I'm on the right track. I don't like to hear "the numbers look good" I want to know what the numbers are supposed to be. Thanks!!!!

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