PCOS & Follicle Maturation: Understanding Delayed Development

Question
I was diagnosed with PCOS 1/09. I am currently seeing a fert specialist and taking 100mg Clomid CD 3-7.  This is cycle #2.  The first cycle I had a follicle that was 18.5 on day 12.  This cycle, day 12, the largest one was only 11.5.  I had a follow-up US day 15, and still the largest one was 11.5.  My RE canceled the cycle.  Is it possible that I will ovulate this month, only later?  Could my follicles just be maturing slowly?

Answer
Hello,

Chances are that the follicle is not growing, and may not be an actual follicle, but a cyst, that could be left over from a previous cycle.  Usually follicles grow a couple of mm each day, so the fact that there was no change from day 12 to 15 indicates that it was not a viable follicle.  Good luck with your next cycle. Since you responded well last time, it's unclear as to why you didn't produce a mature follicle this time.  Your doctor might want to discuss another medication if no success after another cycle.  Good luck.