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how accurate are sonograms

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Old 09-06-2008, 03:36 PM   #1
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how accurate are sonograms

how accurate are sonograms at telling how much the baby weighs? i go on monday to find out how big he is and im thinking hes probably pretty big cuz ive been having trouble again regulating my blood sugar. im nervous there gonna tell me hes like 9 pounds already cuz i know a nine pounder will not fit out of me. my pelvis is tilted and i have a small frame and i dont think i would be able to have a vaginal birth if hes more then 8 some pounds. but then it also makes me think well what if they say hes like 6-7 pounds but really he is 10 pounds and i go to push him out and he gets stuck. i dont know how close sonograms can get to the real weight.

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Old 09-07-2008, 06:43 AM   #2
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Re: how accurate are sonograms

From what I have read they can be within a pound plus or minus. But I've also heard stories of them being WAY off. With my first daughter, it was pretty darn accurate. I am going Monday to have a Biophysical Profile done and am also looking forward to seeing how much our little girl weighs. At the last one she was 4 pounds 8 ounces (and was considered a little on the small side but nothing to be worried about) so I am curious to see how much she weighs now.
~Ella Ann, July 2, 2007~
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Old 09-07-2008, 10:22 AM   #3
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Re: how accurate are sonograms

A friend of mine had a baby girl back in July. 2 days before she was induced, they told her the baby was weighing 7lbs. The baby came out weighing 9lbs. 6oz.!! So needless to say, they can be off. My friend had GD too so she didn't think it was too accurate and knew she would have a big baby.

Old 09-07-2008, 12:29 PM   #4
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WhiskersOnKittens HB User
Re: how accurate are sonograms

When my sister had her little guy, the ultrasound told her that he would most likely be on the smaller side (I think it said he was 5lbs at the time, and this was only a few weeks before she was due), and he ended up being 9lbs 4oz! She was worried for nothing. So, I really don't tend to trust what the ultrasound says.
As far as the baby getting stuck, I don't think your ob would let that happen, they should be able to tell before you begin pushing the approx. size, and if they feel you won't be able to get him out, they will do a c-section. Good luck!

Married my best friend - July 06'
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Old 09-08-2008, 10:50 AM   #5
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Re: how accurate are sonograms

Later ultrasounds aren't as accurate as early ultrasounds because the baby is curled up. I overheard a woman in the doctors office say she had a c section because the u/s said the baby was over 9 pounds, but only weighed 5.

Old 09-08-2008, 02:50 PM   #6
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Re: how accurate are sonograms

i just had it done and i got an estimate of about 7 pounds 2 ounces and the tech said that they are usually within a pound of the real weight. i was so relieved to hear that number i was really nervous that because of the gd they were gonna tell me he was 10 some pounds

Old 09-08-2008, 03:53 PM   #7
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Re: how accurate are sonograms

Before I had my son, my doctor warned that the ultrasound said he'd be nearly nine pounds. He was 5 LBS 11 OZ. Hah!

Old 09-08-2008, 03:54 PM   #8
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amanda26 HB User
Re: how accurate are sonograms

With my daughter, over 2 years ago, they told me she was going to be over 8 lbs. based on all her measurements, plus I gained a lot of weight. She came out at 6 lbs 15 ounces. She was just long and skinny. All arms and legs, so we got lots of comments on our little "basketball player".

Old 09-09-2008, 08:23 AM   #9
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lbp35 HB User
Re: how accurate are sonograms

Had to have one @ 36 weeks cause I was measuring small. They told me my dd was about 5 lbs!!! She was born @ 37 weeks weighing 6lbs 10 oz and beautiful!!!!!!

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