At my 13 weeks scan on Friday it was reported that the baby has a single umbilical artery or two vessel cord as it's also known, instead of a three vessel cord. It was made worse by the fact that at my 11 week scan I was told there were three vessels and had put the worry out of my head. At the scan the other organs, heart, brain, bladder, kidneys so far look normal. As its a PGD tested embryo I'm hoping there are no chromosomal issues. The Panorama NIPT results all came back low risk. My next scan is in 2 weeks. Just looking for any experiences with single umbilical artery.