Hi, I went to GP about a month ago to ask what next with trying for a next baby- weve been trying for over 2 years now and no sign, although we do have one child already so it has "worked" in the past. He did a load of blood tests. Bloods came back as TSH is bit high- it was around 5.7 with range 1-5.5 cut off I think. He said this may be the issue, but fertility clinic wont accept a referral until we get TSH to a normal level of between 1 and 2. I am supposed to have another blood test tomorrow to double check it wasn't a one off, so I signed up for the online view my records. Just looking at it today I can see I've had TSH tests several times in the last 18 months/2 years as investigations for other things- query ME at one point, I had very low Vitamin D crash at another point and also had glandular fever at another point- TSH was tested at each of these times. So I have felt unwell regularly for a while now and had no luck with trying to conceive. My TSH has been steadily rising- it was 2 in 2014 (whilst pregnant), then it went to 3 in Spring 2016, 3.7 in Autumn 2016 and now a year later it is 5.7. I don't know what the next bloods will show, but do I have enough "proof" already that TSH isn't where it should be? What should I be asking to happen next? Do I need treatment at this level? T4 has been tested each time too- it is always between 13 and 15.5, not showing any pattern of going up or down. Thank you for any advice.