1A1V (Single Umbilical Artery)

Single umbilical artery affects approximately 1 out of 100 live births and is the most common defect of the umbilical cord. A typical umbilical cord has two arteries and one vein.

When one artery stops growing or when the primoridial umbilical artery does split, simgle umbilical artery can occur. One artery is capable of supporting a pregnancy to term, so the disorder does not pose a threat directly to your developing baby. However, there are other birth defects that your child may be more likely to inherit because of the single umbilical artery.

Approximately 25% of babies that have single umbilical artery will have other abnormalities. These can include heart defects, gastrointestinal abnormalities, central nervous system complications, urinary tract complications and trisomy 13 or 18.

Healthcare providers can diagnose the condition after an ultrasound examination shows one artery that is large with only two vessels visible.

Comments: 1A1V-(Single-Umbilical-Artery)

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courtenay - 20 days ago.
wow, okay, i havent been on this forum in about a year, since i had my little baby, but i wanted to pop back on and let you all know that my little SUA baby turned 1 on October 13th. She was born a year ago, at 39w 1d (so NOT early), she weighed 8lbs 13oz (so NOT small) and she had no further complications. She is amazingly smart and beautiful. Shes talking and walking already. So dont let SUA bring you down, everything can (and usually does) turn out JUST FINE. Keep up the good work baking those babys mama`s and if any of you ever need some support from someone who knows a LOT about SUA and has been through a LOT because of the SUA then feel free to send me a message :)

rennie311 - 37 days ago.
Greetings, first and foremost thank you to all the wonderful moms that are writing about their success stories, the information you can gather about SUA can be disheartening...this site has been my main source of information these past few weeks. This is my second pregnancy and I'm due tomorrow, needless to say there has been some anxiety with this pregancy but all ultrasounds and general monitoring have been normal. My doctor is confident that baby is doing well and according to ultrasound is currently 8 pounds 6 oz, certainly defying the odds of SUA. I'll keep you posted, looking forward to meeting my babe and optimistic that I too will have a completely positive outcome to report next week!

butrflybel - 40 days ago.
Hello ladies! I'm so glad my guardian angels sent me to you all today. I havn't got much to write as yet as I am yet to speak to a dr on Thursday. I to had my 20 wk scan got a big fright, came home read up and cried all afternoon. I too have SUI and a little hole in bubs heart. I went through SVU and heart defect with no 3 baby and that was stressful itself. He was born perfect! I am just relieved to read all your comments and I too will do the same for other mums in our boat. Goodluck to you all! Bel

due4number-4 - 41 days ago.
Hi All, had my 32 week ultrasound this morning baby is weighing 4pounds as should be the sonographer said all was looking good can't wait to recieve the report just wanted to let everyone know how baby is coming along with the SUA ,will update once she arrives!

d2l4lt - 87 days ago.
Well, my lil boy was born with his two vessel cord and all at 10 lb 8.9 oz and health as can be. I'm so proud of him. He is a cutie. I just want to say thanks for everyones support. I would not have made it without this site. I was so scared to even know if he had any issues but he didn't and it didn't matter if he did. Just know that if your child has a two vessel cord he or she will be ok.

MarcieB - 90 days ago.
Just wanted to comment, at 31 weeks baby was 5 pounds. Big Girl already! I'm going in on weekly growth scans and everything looks great.

azmom - 93 days ago.
Hello ladies- This is my update to you all. My daughter was born totally fine, 5 days LATE and over 9 pounds. I did the NSTs twice a week for the last month, and nothing was ever abnormal. Have faith...if there are no other abnormalaties, SUA can be a variation of normal. Another healthy baby of SUA reported here...good luck!

Chicana08 - 117 days ago.
Thank you to all. I was told that baby had SUA just last week. I haven't had my second ultrasound yet, but I as well searched the internet and freaked out. I pretty muched cried non stop. You ladies give me much hope and less worry. I will inform you all after my next ultrasound. Thank you again.

due4number-4 - 123 days ago.
l am so glad this site exists! l had my 20 week ultrasound yesterday and was told my baby has SUA this is my fourth and honestly l have never in my life heard anything about this the tech said that l would need an extra ultrasound at 32 weeks to make sure bubs is growing well and not to worry ..but as soon as l got home l have been googling and pretty much have scared myself with all the info that l have looked up and percentages, but no real life stories like l have just read now in these comments must say a big thankyou to all the ladies who have updated this section on sua l have read all positive things finally!!! now l may sleep a little better

xxryans~mummyxx - 124 days ago.
Hi all, I was in the same boat as you last year and with no information I also researched the internet and freaked out but my pregnancy went well and I gave birth to a healthy 8lb 1oz baby boy, he's now 7 months old and is in perfect health weighing 16lbs 12oz's, once we had our last scan at 36 weeks the words SUA were never mention again and we had no follow ups once Ryan was born not that we needed any, please try not to worry if they didn't spot any other issues on your 20 week scan your baby will probably be fine. Good luck and enjoy your pregnancies xxx

barbi - 128 days ago.
Just wanted to post another success story... I was diagnosed with SUA and CPC's. Same story as most of the posts... docs told me everything looked good but I googled and googled and found all kinds of scary stuff. My son was born completely healthy. I too wish I just could have enjoyed my pregnancy, but this is definitely easier said than done. Hang in there ladies, it is all worth it in the end.

d2l4lt - 129 days ago.
I just had to send an updated on my little man. He is almost 7 pounds at 35 weeks. All looks well for now. I have a 3d ultrasound on 4th of July. Can't waitl Hope everyones doing good.

redheadmama - 132 days ago.
just wanted to mention that I myself was an SUA baby and never had any problems. so if that's encouraging to anyone.... :) just thought I'd share!

kittydisney - 133 days ago.
Update.. I am 32 weeks pregnant and Ashlyn is measuring perfect... I am diabetic, suffer APS and have 1A1V. So with two things that would cause her to be small and one thing that would cause her to be big, she is perfect right now!!! Good luck ladies and I hope you can share great news with future updates too!!!!

MarcieB - 151 days ago.
Good morning moms. I just wanted to report, I went to the doctor yesterday and received good report. Baby weighes 1.5 pounds and her spine still shows no signs of spina bifiida. Doctors did do 2nd confirmation on SUA but said that she seems to be gaining weight good. I'm in week 23 so 1.5 pounds looks about normal from what I have read. Thank you all for the encouraging comments and prayers. We still have a long way to go (115 days) but I feel a little better about everything. Hope everyone has a great day.

emma32uk - 152 days ago.
Hello ladies, just to let you know that i have had my little girl on the 2nd june. they left her umbilical cord long after she was born so they could do a few tests and every thing seems ok. she weighed 7lb 15 oz so was a good healthy weight and shes doing just fine, had a few major problems during labour though. i have written my birth story on my profile under my children section if you wanted to read. its nice that babies with the SUA can come out ok. i wish all you pregnant mummies all the best. Emma xxxx

tennmom - 160 days ago.
marcieb - i was in your shoes about 4 weeks ago - during my routine ultrasound the tech noticied i have 1A1V - while she said there were no apparent issues present, I did like most people and searched the internet and FREAKED OUT!! This forum has been great for me as well to hear all the positive stories - I have since had 2 more ultrasounds and my baby girl is growing right on schedule. We are healthy at 26 weeks and have no problems present with heart, kidneys, growth or anything - just have faith in God and trust in your doctors that they will take care of you and will let you know if anything looks out of the ordinary - I had to learn to trust my doctors and if they weren't worried, I shouldn't be.

MarcieB - 160 days ago.
I just wanted to say thank you to all the positive comments posted here. I am 22 weeks with my first child. I was told last week during a screening and u/s with a specialist (for spina bifida) that her spine looked okay but he said she had a SUA but no other noticable problems. Of course I had no idea what this meant. I looked it up on the net later and just scared myself more. It was so great to see some positve stories about children with the same thing as mine. Good luck and once again, Thank you to all.

azmom - 160 days ago.
Hello Ladies- Once again, I only have great news to share. The week 32 US went great. Baby is over 4.5 lbs and measuring AHEAD of schedule. Kidneys, heart and liver are all perfect. SUA or no SUA, I am confident this baby is just fine. I don't need any more ultrasounds, but I do start my non-stress tests in two weeks. I will keep you posted up until baby is HERE!

no.3onboard - 171 days ago.
Hi Moms!!! First of all, congrats to you all!! I was in your shoes last summer, when I found out our baby had SUA. Just like most of you, I freaked out; cried, worried, read the internet and did not enjoy my pregnancy. DON'T DO THIS LADIES!!!! Being pregnant should be a wonderful time and unfortunately I let this minor setback take the fun out of it. I regret this so much. Luckily this was my 3rd pregnancy, so I had experienced it before and have a feeling I will again soon. I also had a lot of extra ultra sounds, an echocariogram on the baby's heart at 24 weeks and then more ultra sounds. They never found anything on any scans or growth checks. The last few weeks I had NST every week and even these were normal. Baby was born 11 days early, and no issue worth mentioning. After all you can think about for 5 months is the unknown, and then the baby is born healthy and you probably won't hear your doctor mention the words SUA again. We did have a ultrasound done on his kidneys when he was 9 days old, and all was perfect. I know you will still worry (as we did), but just place this in God's hands and let Him handle it. You can not control anything. I agree with someone elses post on here, that they need to give more explaination on the sites that you find about SUA. I think that the percentages are confusing. I am retty sure that when they give a percent of babies that are born with defects or major problems it is NOT SUA that causes these defects; it is just kind of a side effect. Meaning if you get the baby checked out on U/S and they do not find anything; it is highly unlikely you will find something major when he/she is born. I am no doctor, but have been through this one. I hope I have lifted your spirits a bit. I know it is unsettling. Hang in there. In a few months you will be writting a post to other mom's that have just gotten the SUA news and trying to cheer them up :-) Happy baby growing!!!

Katelyns Mom - 174 days ago.
My Katie was also diagnosed with SUA early on in my pregnancy. I was really concerned with it so I had an amnio. It turned out she has a minor chromosome deletion called 18P. Needless to say it caused me a great deal of worry. I just wanted to let all you ladies know that just because your baby is diagnosed with something, it doesn't mean he/she won't be just fine. Katie came 2 months early, not related to her conditions. I had pneumonia and pleurisy twice and because I was so sick, my water broke early and I deveoped an infection. Regardless, she weighed in at a hefty 4 lbs. 1 oz. which is great for a 32 weeker. She spent 20 days in the NICU and was released to us a 4 days before my 40th birthday. She is perfect and beautiful and has no major health conditions. She eats like a champ and has doubled her birth weight in 2 months. There are pictures on my profile if you'd like to take a look. I'm so proud of her. Just have faith and don't read too much on the internet, it can scare the hell out of you sometimes. Trust your doctors and your own instincts. Everything I read told me babies with SUA can be born small and with all kinds of problems. From talking with other mothers who've had babies with this condition, that is not the norm. Just wanted to share a story with a great outcome. Good luck to all of you and to your little babies. They bring such incredible joy.

azmom - 184 days ago.
Hello all... I am trending a little small, 40% to weight at week 30. I am going to the doc today. All vital organs are great and AOK...so I am not really worried about size. That can be made up in a week. I will keep you posted. 10 weeks left! ...Ladies...anyone have pit for other pregnancies and worried about using it this time?

kittydisney - 186 days ago.
Six weeks ago when I found out our baby girl has 1A1V she was 2 days smaller than she should be, last Wednesday the Ultrasound tech said she was right on schedule.. What a relief, she was 1.25 lbs..

emma32uk - 187 days ago.
Hello, i have had my last growth scan today, im 35 + 5 weeks pregnant. all's well with the baby, shes weighing approximatley 6 lbs 10 oz, which im happy about as i still have 30 days to go. nothing was spotted due to the SUA condition which is even better . they said she was above the average growth rate, so the SUA hasnt affected her size. so i just have the big count down now, im so excited and cant wait to meet her. just thought i would let you all know xxx

azmom - 192 days ago.
Hello ladies. My second level 2 ultrasound is this Friday. We are at week 28, and seems to be going well. I have a healthy mover and kicker...I will post next Monday and let you know our results.