Kinda worried!

Desiree • mother of 3 amazing kids
Baby girl Vivian is growing the doc is concerned about her umbilical cord, I'm 25 weeks almost 26 we had the anatomy scan at 21/6. Her cord only has two blood vessels supplying blood to her so my doc has ordered another ultrasound to check on her growth. I'm now on a medium risk pregnancy for premature birth. Has anyone else had this issue and made it full term? Thanks so much for your response.