Ive just been reading an article, and it states that BBT should be around 36.2*c before ovulation. Ie the lowest temp for the days leading up to ovulation. However my temperature is consistently lower than this. Around 35.80 approx for the two weeks before. It said in the article that it can be a sign of hypothyroidism which I actually do have. I was diagnosed 15 years ago and have been taking levothyroxine every since. My levels have always been good when the doctor checks, however I’m now thinking are they not good enough? And is this something stopping me from conceiving? Any thoughts please?