Diaper Swappers

RedheadMom09 · 03-26-2012, 07:50 PM

Saw my OB on a Friday, they estimated DD at 6 lbs, 2 oz. She was born on Sunday, two days later, weighed 6 lbs, 0 oz. She had meconium, which I think was what made the difference. If not for that, she would have been spot on. A lot of it depends on the experience of the sonographer.

CountryChicMama · 03-27-2012, 06:18 AM

Mine have so far been almost spot on. They predicted DS2 at 36 weeks to be around 9.2 at birth and he was 9.8. This baby is predicted to be about 8.12 to 9.2 and I'm 3 days late now, so we'll see.

3 ladybugs · 03-27-2012, 06:57 AM

I had a sono at 30w 6d and my Peri said that my son would be 8 lbs at his birth at 38w 0d (planned c-section). He was 8 lbs 1 oz at birth.

I think it really does depend on the experience of the person doing the scan. I was

shocked when he was born at that weigh from that sono 7 weeks earlier.

Queen_Celeste · 03-27-2012, 07:03 AM

The weights are based on measurements. So if your child is measuring perfectly at 34 weeks, but their waist and chest are measurments are at the 90th percentile, their weight can be pretty far off. I had one at 36 weeks 5 days. My OB said that the weight wasn't really what she would call accurate, but since the waist size was so much bigger than all the rest of the measurements we should be prepared for a hard delivery. Turns out the weight calculations were pretty spot on and I had a 9lb 4oz baby on my due date...but he was over and inch shorter than my first child and we went home wearing 3mo clothes becasue he was nice and round in the middle.

ChocolateMoose · 03-27-2012, 07:42 AM

Quote:

Originally Posted by g-offsmommy

Mine was off by 2 lbs! I was told he was over 9.5 lbs, he was only 7lbs 4 oz.

jessicalev8 · 03-27-2012, 09:16 AM

I never had late u/s with my previous 2. This one was estimated to be 6lbs 10oz at 36 weeks so if thats accurate she should be right around 8lbs right now. We'll see! She did have a massive belly though, not sure if that messes anything up. Her bones measured right on target with my edd but her stomach was 3 weeks ahead.

mommyria2 · 03-27-2012, 11:12 AM

I had an U/S the day ds was born @ 33wks 2days, they estimated he was 4# even and he was 4# 8oz. Seems like half a pound makes a big difference when they are that small.

isabelsmummy · 03-28-2012, 11:04 PM

They are so inaccurate in late pregnancy I can't even figure out why they bother?! It's weird.

seacat · 03-28-2012, 11:11 PM

Mine was eight on they said he was 8 lbs 2 oz at 36 weeks he was born at 32 weeks weighing 8 lbs 8 oz. I didn't have a late one with DS1.

03-26-2012, 07:50 PM	#31
RedheadMom09 Registered Users Join Date: Sep 2009 Location: North Carolina Posts: 544 Ratings: 11 Feedback: 100% My Mood:	Re: How Accurate are Sono Weight Estimates? Saw my OB on a Friday, they estimated DD at 6 lbs, 2 oz. She was born on Sunday, two days later, weighed 6 lbs, 0 oz. She had meconium, which I think was what made the difference. If not for that, she would have been spot on. A lot of it depends on the experience of the sonographer. __________________ CEO of the home, SAHM to DD born 12/2008. CDing, EBFing, ERFing, trying to adjust to the culture shock of giving up a great career to be a SAHM, proud liberal milspouse to CPT Dan. Congenital heart defects affect 1 in 100 babies. What if that 1 was yours?

03-27-2012, 06:18 AM	#32
CountryChicMama Registered Users Join Date: Apr 2009 Location: On a farm in Georgia Posts: 3,103 Ratings: 11 Feedback: 100% My Mood:	Re: How Accurate are Sono Weight Estimates? Mine have so far been almost spot on. They predicted DS2 at 36 weeks to be around 9.2 at birth and he was 9.8. This baby is predicted to be about 8.12 to 9.2 and I'm 3 days late now, so we'll see. __________________ SAHM , happily married to DH since 4/05; Mommy to our little Doodles 2/08, my VBAC babies Owen 3/10 and Samuel 4/12.

03-27-2012, 06:57 AM	#33
3 ladybugs Registered Users Join Date: May 2008 Location: New Jersey Posts: 10,770 Ratings: 6 Feedback: 100% My Mood:	Re: How Accurate are Sono Weight Estimates? I had a sono at 30w 6d and my Peri said that my son would be 8 lbs at his birth at 38w 0d (planned c-section). He was 8 lbs 1 oz at birth. I think it really does depend on the experience of the person doing the scan. I was shocked when he was born at that weigh from that sono 7 weeks earlier. __________________ Jennifer (36) - When DH and I got married in Dec. of 2003, he said "in sickness, health, to death". What he didn't know was we would loose 3 children, have a miscarriage, have a living son and have me battle cancer all before our 7th anniversary! Cancer free 24...28..32...36..Nathaniel Harlow Read story here or here.

03-27-2012, 07:03 AM	#34
Queen_Celeste Registered Users Join Date: Nov 2007 Location: Kansas Posts: 2,980 Ratings: 54 Feedback: 100% My Mood:	Re: How Accurate are Sono Weight Estimates? The weights are based on measurements. So if your child is measuring perfectly at 34 weeks, but their waist and chest are measurments are at the 90th percentile, their weight can be pretty far off. I had one at 36 weeks 5 days. My OB said that the weight wasn't really what she would call accurate, but since the waist size was so much bigger than all the rest of the measurements we should be prepared for a hard delivery. Turns out the weight calculations were pretty spot on and I had a 9lb 4oz baby on my due date...but he was over and inch shorter than my first child and we went home wearing 3mo clothes becasue he was nice and round in the middle. __________________ Rebecca Wife since Nov 2006, mama since Dec 2007, and again Jan 2010.

03-27-2012, 09:16 AM	#36
jessicalev8 Registered Users Join Date: Feb 2010 Location: Missouri Posts: 1,689 Ratings: 2 Feedback: 100%	Re: How Accurate are Sono Weight Estimates? I never had late u/s with my previous 2. This one was estimated to be 6lbs 10oz at 36 weeks so if thats accurate she should be right around 8lbs right now. We'll see! She did have a massive belly though, not sure if that messes anything up. Her bones measured right on target with my edd but her stomach was 3 weeks ahead. __________________ Jessica -- DD (9-11-08) DS (4-22-10) DD2 (3-38-12)