I'm almost 32 weeks and with every day I get more and more confident that this is happening! You ladies know that the worrying is never completely gone though. Now I'm mostly worried about baby after she's born. At our 20 week sonogram I noticed her cerebellum measured 18 weeks-they didn't say anything. At our 28 week check up the cerebellum measured 26 weeks (still the same amount behind) but this time I saw the calculation say that this is the 4th percentile. She's in the 40-60th for everything else. The doctor said nothing about it and that everything looks good. I have another sonogram this afternoon and I can't stop thinking about it. If he doesn't mention it today, I'll ask...but I'm worried about hearing such a low number like 4th percentile. I hope shes ok!
Our Novel of TTC:
*Male Factor (low count and low motility), High Prolactin, and Polycystic Ovaries (March 2013)*Recurrent Miscarriage testing also revealed high anti-phospholipids & single MTHFR mutation. (Feb 2014)
Our healthy baby girl was born 03/10/15 thanks to daily Lovenox injections and baby aspirin. There are no words for how grateful I am for our rainbow baby. 
Re: Any experience with Baby's cerebellum measuring small?
Me (34); DH (35)
BFP 11/25/13; Heard strong heartbeats for 3 weeks; Natural MC (1/15/14)
BFP 11/11/14 EDD 07/21/15 hoping for our rainbow!