I went for a gender scan a couple of weeks ago, when I was 16 weeks and the sonographer suddenly switched it to 3D for a minute or two, which was lovely and also a bit freaky. I don't think at that early a stage its a great idea though! Anyways, he gave us some pictures and off we went, however the 3D picture looks like my baby is missing the top of his head and now I can't stop worrying! Is this normal for a 3D scan?