Hello. I'm new on here. I'm really anxious that my baby has a birth defect eg downs or cerebral palsy. Reason being I have been having routine growth scans, everything has been fine until my scan at 34+3 where baby's AC dropped from 67th centile to 38th centile and is also breech. I read that this could be due to a birth defect as none of the other reasons apply, umbilical cord flow and aminiotic fluid ect satisfactory. The unknown is making me feel so anxious. Anyone else been in a similar situation? Thanks in advance