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It's just that all the post about E2 mention the 20-30 range and that does not apply to the European standard. Here, at my lab it has been values like <162 pmol/L, then <150 pmol/L and recently 95-223 pmol/L. As you can se if you convert my last test that was 131 on the 95-223 range to pg/ml you get 36? The lowest value is 26, just wondering how this fit in when most people are suggesting values between 20-30.