Shoegal - Yes, I was having BTs to work out O. I think they waited until my oestrogen was around the 800 mark (or possibly around there to 1000), then had me come in for a scan to check on the follies, then I had a BT the next day which showed the LH surge meaning you will O in the next 12-48 hours (I think). It took a while for my oestrogen to get high enough for them to say to come in for a scan, but I think for some people it happens a bit more quickly! I hope this helps!
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