After a long few days of lurking, I've decided to take the plunge and post to see what words of wisdom you lovely ladies can offer. At our 20 week scan, the so no graphed detected a cleft lip, small head and problems with the heart and kidneys. She gave us the devastating news that the most likely cause was T13 or 18. I had completely missed the point of the 20 week scan and had no idea what she was talking about although it soon became all too clear with the help of good old Google. We saw a fetal medical specialist a few days later who confirmed the sonographers findings and also explained that there was a part of the brain that she couldn't see. She agreed that 13 or 18 were the most likely causes. We are now waiting for an amniocentesis this week after much soul searching about the risks. I'm not looking for people to tell me it's all going to be fine; so many severe defects do not make for a healthy, typically developing baby. I suppose my question really is, does anyone have any experience of these types of markers being caused by something else? The recently born baby of a close family member is about to begin genetic investigations for a possible chromosome disorder (unknown ) which may have come from either side if their family (I. E. not necessarily my family ) so the problems with our baby could be related. So many unknowns at the moment