Single Umbilical Artery Advice?

Megan • FTM, 32 years old

At the anatomy scan we found out our girl only has one of her 2 arteries in her umbilical cord. Doctor downplayed it and said it was super common. Well I researched it a bit and it's only .5-1% of pregnancies, but ups birth defects to 25-30%, most commonly premie sized births.

Anyone have experience with this or advice?