2 vessel placenta

Melissa
Hello ladies, 
My husband and I went to our 20 week anatomy scan. During our ultrasound we found out that our placenta only had 2 vessels instead of three. We are being sent to a specialist to have a closer look at the placenta, spine, and heart. We are very concerned and have read stories online where the 2 cords make up for the third. I have also read about still births because of this condition. Thoughts and personal experiences would be approached!