Ovulation without temp rise?

[kym b.]

Have any of you ever experienced this? Since trying out clomid (this is my second cycle... but really my first, since I was taking Vitex during the first round and didn't know that would negate the effects), I have not gotten a temp rise after ovulation. I always used to! I don't know what's going on... click on my chart (in my signature) and please let me know what you think. Thanks!