I had private blood tests recently to check things out before I start my post-new year healthy lifestyle blitz (mainly for checking my cholesterol which is, as I suspected, very high - so the tests are the kick up the bum I need to stop eating so much cheese!). Anyway, as part of the tests it checked my hormones and it said my oestradiol levels were 18.4! I'm late 40s and experiencing irregular periods, hot flushes etc but 18.4?!!! That seems very low. Last period was start of October.