At 20 weeks I found out my daughter had a 2 vessel cord. We've had some extra ultrasounds and for the last several weeks have had NSTs twice a week. I am 38 weeks along today and feel great. I am not really uncomfortable and baby moves around great. The baby is healthy, although kinda small (in the 23rd percentile
according to my doctor. She was in the 40th percentile a few weeks before that), and has not shown any signs of distress during
any tests done. And she was preforming all the right movements in our
last Bio-physical ultrasound. But my doctor told me she would probably want to
induce me around 39 weeks. I do not want to be induced and told her so
and she said that at 40 1/2 weeks at the latest we'd want to get her
out. I am wondering if it is common for labor to be induced with babies
with 2 vessel cords, even if they are doing just fine. I had been very
much planning on allowing her to come when she is ready, not when the
doctor decides she should, but now it doesn't look like I am going to
be allowed for that to happen. I mean, I understand if she was in
distress or something then I would do whatever needs done to make sure
she is born healthy, but there has been no reason IMO for the doctor to
decide that. So anyone else have experience with Single Umbilical Artery (2 Vessel Cord) babies and being induced early? Thanks so much!

Re: 2 Vessel Cord and induction
I also have SUA and no mention about being induced for that reason...I can't imagine why they would want to induce for that...I would ask the OB what the reasons would be...
I also have diabetes so they are talking about inducing me at 39 weeks for that...but its not because of the SUA
With Margaux, my doctor was talking induction if we went past 40 weeks, because her growth seemed to be slowing down a bit too much for his comfort level. He told me the two-vessel cord can feed the baby okay through most of the pregnancy, but toward the end the placenta ages and loses some of its ability to nourish... so the combination of the two-vessel cord and the aging placenta was what was worrying.
I ended up going into labor on my own at 39 weeks anyway, but I thought I'd share what my doctor told me.
I had SUA with my youngest, and I was scheduled to be induced at 38 weeks. I start having contractions the night before, but still needed the pitocin by the time I went in. The reason they wanted to induce me was because she was consistently failing her NSTs. And when she was born, we found out that she did have velamentous insertion of the umbilical cord, which could have been really dangerous. They also want to make sure she isn't suffering from lack of nutrients due to the 2 vessel cord.
That being said, it is probably fine if you want to wait a bit longer. I know that it's more fun to go into labor without help. From the beginning my doctor said he would probably not let me go past 39 weeks. I didn't like it, but I really trust my doctor and know he was doing what was best for my baby, and it really was the right decision since things were even worse than we thought. I think it's just better to be safe than sorry.