I am waiting for my period to show up to start my next IVF cycle. SO I saw some major spotting (CD 42)and hit the GO button. Went in for baseline u/s and they saw a 12mm follicle. SO asked me to take a Ovulation test in 2 days and come back for another scan in 3 days. 2 days later OPK is as negative as can be <sigh> Spotting went down since 1 day after. U/s tomorrow...
I probably think there must have been some other follicle which might have ruptured or another possibility is the present follicle is yet to develop to maturity in another day or two. USG may show u further details. Good luck. Tc.