Has anyone had this problem?

Brittany • Mama to two beautiful girls expecting our 3rd in March! 💜❤️💚
I just had my 20 week ultrasound yesterday. I got a call back today and was wondering if anyone has dealt with this...the doctor says the cord is only showing two vessels when it should have three. I see a high risk doctor in 3 weeks and we will go from there. My doctor said the baby is looking healthy right now. That if I do in fact have only two vessels the baby would be delivered early... I didn't know if anyone else went through this and had something to share about it?