question: Hi, may I answer your health queries right now ? Please type your query here... I am nearly 24 weeks pregnant and have had lots of scans and an Amnio, my 20 week scan showed my baby to have a small head so I was asked to return yesterday where my baby s head measurement was off the scale on the small side so I have been asked to go back in four weeks. The sonographer couldn t tell me what it possibly meant because she wasn t trained in that field but obviously I am very worried. She mentioned genetic disorders of which the Amnio tested the major 3 and I got the all clear. What other genetic disorders could this dipict.