2 vessels in umbilical cord not 3

[Newfamily2014]

Just had my 20 week fetal anomaly scan. All fine and ten she told me there are only two vessels in the umbilical cord not three.
Ultrasonographer wasn't worried and said I would get another scan at 30weeks to ensure baby growing well.
I've don't the worst thing and googled it. Seems it's treated totally differently in America. Far more tests. Can be associated with lots of conditions.
Has anyone else any experience of this?
Very worried

Thanks again for all of your replies. I was wondering how many of you had a normal vaginal delivery with the SUA? any how many had to have an intervention or c-section due to complications of the SUA during delivery?

dc1 had that.
it can be a marker for other things but apart from wanting another scan at 30 there was no concern as everything else measured up fine.
dc is now 9 and growing well

Thanks vegetabl glad to hear your dc is healthy and doing well.
May I asked if you had a normal delivery or needed a c-section?

When pregnant with my youngest, they found I only had two vessels, I was sent out but asked to wait and then had another scan. Nothing else unusual was found. He was born at 32 weeks and is now a completely healthy, happy 7 year old.

dc was a normal delivery.