I agree with kim.b. I've been looking at the FF charts and heaps don't go above 36.6 nor stay there if they do but still the ladies were pg. I do think it's supposed to stay up after O but many of those charts show temps going up and down so who knows..... I'm 5DPO & my temp shot up to 36.9 from 36.3 where it's been since O so I'm hoping that it's a good sign. I've only just started charting this cycle though so maybe I always do that.