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-   -   38 week ultrasound- how accurate is the weight estimate? (http://www.diaperswappers.com/forum/showthread.php?t=1502219)

steph410 03-21-2013 04:26 PM

38 week ultrasound- how accurate is the weight estimate?
 
I know that the weight estimates from an ultrasound can be off by a lot, but what I am wondering is if, in your experience, did your baby turn out to be bigger than the estimate or smaller?


my late ultrasounds were always pretty accurate personally...

mibarra 03-21-2013 05:20 PM

Mine were pretty accurate as well.

Blessed2005 03-21-2013 05:23 PM

Re: 38 week ultrasound- how accurate is the weight estimate?
 
My sil just had twins, they were off. I think I heard it can be 1 lb either way?

canadianbakers 03-21-2013 08:03 PM

Re: 38 week ultrasound- how accurate is the weight estimate?
 
I've heard +/- 2lbs is the window they give. That's a pretty big window, IMO.

Hmm... I had a late u/s with DD, 36 weeks I think - the OB was exactly right on his weight estimate... but he was amazing :)
DS1 had a 36ish week one - it was off, but I can't remember exactly how much, or even which way. :dunno:
DS2 we had a couple quick scans the week he was delivered, but they were just to check positioning, so no estimates or measurements were taken.
DS3 I had a scan at 41+2 - the OB tried to tell me he was "well over 9lbs" (she was really pressuring me to have her do an immediate c-sec :puke: ). He was born 2 days later at 8lbs 14oz.

ktmelody 03-21-2013 08:14 PM

Ive had both.


At 34w4 days they measures DD5 at 4 pounds 1 ounce. She was born less than 24 hours later and was 6 pounds 1 ounce. (My peri did the measurment but didnt deliver)

DD 7 was measured less than 24 hours before birth and my OB did it. He got 8 pounds 13 ounces. She was 8 pounds 14 ounces.

SamanthaSews 03-21-2013 08:22 PM

Very accurate, I had a U/S done a couple days before ds was born- he measured 7lbs 2oz and he was born 7lbs 3oz.

But I wonder how much of it was from the fluids they pumped into me during labor?

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lynn97 03-21-2013 08:30 PM

I didn't have one at 38 weeks but I did have one right at 40 weeks and delivered 3 days later. My u/s was way off. They estimated baby to be 9.5 lbs at 40 weeks but he was a little less than 7.5 lbs. my OB said that he was much smaller than the u/s estimated though, based on her assessments of the measurements.

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coquelicot 03-21-2013 08:32 PM

I had an ultrasound done at 37 weeks due to GD. Baby's estimated weight was 7 1/2 lbs. He was born 1 day shy of 40 weeks at 8 lbs, 4 oz, so I'd say it was fairly accurate.

bumminbeachbabe 03-21-2013 08:33 PM

DS1 was estimated to be between 8-8.5lbs 3 days before I had him. He's was 9lbs 3oz.

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gem898 03-21-2013 08:50 PM

Dd was estimated around 7.5 at 39 weeks. She was 8lbs 9oz at 40+3.


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