Apologies if this has already been addressed but I couldnt see anything specific when I searched. Does anyone know the expected reference range for oestrogen levels in pmol/l? Just phoned for results advised 660pmo/l but the receptionist unable to give me a reference range. I have been on Oestrogen patches 100 since May this year, peri, not sure if that would influence what the expected reading would be. Any advice, signposting greatly appreciated. Thought I'd message here before I Google!! x