or Connect
Mothering › Mothering Forums › Pregnancy and Birth › Birth and Beyond › Was the u/s diagnosis of a Large baby correct?
New Posts  All Forums:Forum Nav:

Was the u/s diagnosis of a Large baby correct?

post #1 of 50
Thread Starter 
I know so many people who say that the u/s estimated (guesstimated) a 9lb+ baby, only to schedule a c-section that delivered a 6lb 14 oz...

How often is the u/s right?

I'm asking because my baby is measuring large externally (and I've not gained any weight with this pg, and am at the same size I was when I delivered my 8lb daughter, and 7lb7oz son). He is also measuring large on u/s. I'm just curious if I should take this with a grain of salt, or really look for a larger baby?
post #2 of 50
One of my clients was induced with a "big baby." her doctor claimed that big baby diagnosis can be off plus or minus one pound. Her "big baby" that she was induced and then c-seced for, was just over 8 pounds.

How big a baby are you willing/ able to deliver? A fellow doula delivered a 10 pound baby. i think the "big baby" diagnosis is just another reason for dr.s to set a delivery at their convenience (my opinion).
post #3 of 50
Well if I hear of a story where the u/s was right I will let you know .

Actually I think I read one on here recently. cappicinosmom or something like that. Her baby was really close a week after u/s.

Michelle
post #4 of 50
Here, here... a false "big baby" scare here, too..

Trystan wasn't a peanut, but they were estimating (guesstimating) him to be well over 10lbs... they were expecting him to be between 11 and 12 lbs even.

He was 8lbs, 15.5ozs.
post #5 of 50
My firstborn was estimated to be 8.5 lbs the day before she was born weighing 5 lb 6 oz. This was in line with three different doc's opinions, my OB, the perinatologist (with that super-duper u/s whatever it's called), and the on-call OB at the hospital the day my water broke.

Doc didn't even bother to estimate my second DD's size, but rather asked me how big I thought she was going to be (since I was right about my first). I always told him I thought she'd be right under 7 lbs, and she was born weighing 6lb 10 oz. I think my body just isn't conducive to accurate U/S measurements. I always measured large for dates, and gave birth to small babies.
post #6 of 50
Even if all u/s diagnoses were correct...it doesn't necessarily mean anything. Large babies do not always mean difficult births, even if you have previously had a difficult birth with a much smaller baby. So if the u/s is saying your baby is going to weigh 11 lbs...well, so what? Even if it's true, you won't know what it's like until you're there.

One of the screening questions I asked potential midwives was how they handled the birth of a suspected large baby. They all said there was nothing different they would do and that they would not be concerned if they thought a baby was going to weigh 10 lbs or more.
post #7 of 50
Quote:
Originally Posted by Greaseball
Even if all u/s diagnoses were correct...it doesn't necessarily mean anything. Large babies do not always mean difficult births, even if you have previously had a difficult birth with a much smaller baby.

ITA!

also, i was told my son was "large," and u/s estimated he was 8 lbs at 37 weeks, so my then OB suggested inducing due to "big baby." he was born with no complications at 40 wks 3 days and weighed 6 lbs 9 ozs.
post #8 of 50
I know a woman who had a u/s at 36 weeks and was told that since the baby was already 8 lbs, they could just take him out now! So they did a c-section, which the woman was fine with since she didn't want to be pregnant anymore anyway. He really was 8 lbs, but still...
post #9 of 50
IMO, it is never right. It depends too much on the person reading the data. Maybe ICAN-online.org has stats.
post #10 of 50
Why is there so much time spent speculating baby's size? I can't see how it does anything but stress mom out. Why do we try to guess at all?? What can we possibly gain from it?

I make a point to ask my mw's/ob's not to guess baby's size. I don't need any extra pre-conceived baby-weight worries to add to any labor doubts that I might already have.
post #11 of 50
Quote:
Originally Posted by Greaseball
I know a woman who had a u/s at 36 weeks and was told that since the baby was already 8 lbs, they could just take him out now! So they did a c-section, which the woman was fine with since she didn't want to be pregnant anymore anyway. He really was 8 lbs, but still...
Here's my peeve about this. If you're gonna to a c-section anyway then why not let the baby stay in there and get as big as it wants? The OB is not worried about the "big baby" getting stuck so why take the baby before labor starts? Oh yeah, because the OB is worried about his/her schedule. :
post #12 of 50
Quote:
Originally Posted by Pepper
Why is there so much time spent speculating baby's size? I can't see how it does anything but stress mom out. Why do we try to guess at all?? What can we possibly gain from it?
the excess worry without reason in so many areas of my 1st pregnancy - that is exactly why i dropped my previous OB in favor of my new and fabulous midwife. if only i had known then ... but i didn't know what i didn't know. kwim?
post #13 of 50
I've heard the margin of error is plus or minus 14 oz.

I was told by my OB that it becomes more accurate as baby gets bigger (ie over 9 lbs, over 10 lbs, etc)

Personally, I had an u/s at 38 weeks, she estimated baby at 8 lbs, at 40 weeks, baby was born at 8 lbs, 12 oz.
post #14 of 50
I had an u/s at 36 wks with my dd. The machine estimated her birthweight would be 8 lbs, 4 oz. She ended up weighing 8 lbs, 6 oz, so in our case it was pretty darn accurate. Not that it mattered to me, the u/s had nothing to do with estimating her weight and I'd already delivered a 9 lb 4 oz baby so 8 lbs was a lightweight
post #15 of 50
Quote:
Why is there so much time spent speculating baby's size? I can't see how it does anything but stress mom out. Why do we try to guess at all?? What can we possibly gain from it?
Exactly! Who cares? What's next, u/s to determine hair color? The information is equally useless. Why do so many women have u/s in late pgcy anyway? I used an OB practice for dd1 and there were no u/s after 16 weeks.
post #16 of 50
Quote:
Originally Posted by MilkOnDemand

How often is the u/s right?
Well, I've known it to be right more than not. I know they can be off but I think a lot of times it has to do with the tech. My last OB was only off by 4oz guessing from feeling around and measuring my uterus.
With my first baby they were not off at all, she did weigh 7lbs, with my youngest they said he would weigh between 7.5-8 lbs and he weighed 7lbs 12oz. I'm having another US in a few weeks and they will guestimate weight, though my OB is thinking this baby is going to be the size of my daughter or smaller. (my uterus is measuring smaller, and she measures smaller on US) I can only think of one person they were grossly wrong on when it came to US results and that was with my neighbors first baby, they said she would weigh about 8lbs, she weighed 10lbs plus. More than two pounds off and this baby was born at term and mom did not have GD.
post #17 of 50
Quote:
Originally Posted by Pepper
Why is there so much time spent speculating baby's size? I can't see how it does anything but stress mom out. Why do we try to guess at all?? What can we possibly gain from it?

I make a point to ask my mw's/ob's not to guess baby's size. I don't need any extra pre-conceived baby-weight worries to add to any labor doubts that I might already have.
I think it depends on your medical history. Its really good for me and my health care provider to know how big my babies are since I have a uterine anomaly. I am sure there are other valid reasons to have a guestimate of weight.
post #18 of 50
My OB also guessed my baby's weight by external palpation alone, and was exactly right.
post #19 of 50
I agree with the PPs that a) it's rarely accurate and b) if it is accurate and you're having a big baby, who cares? I would be thrilled to have a big baby! There are so many great things about big babies. Healthier, less fussy, sleep better, nurse better, less likely to be in a "bad" position for birth (meaning that because of their size they have no choice but to choose the best position in the pelvis).

My mantra: FAT IS SQUISHY! BIRTHING A BIG BABY ISN'T NECESSARILY HARDER!
post #20 of 50
When I went in for my NST at 41 wks, ob said, "I'm sorry, you are not a candidate for a homebirth. Your baby will be well over 9 lbs. You need to be induced right now." (He also asked if I was married for some reason.) I had to laugh because I was 9 lb 10 oz and my mom had me all natural. Midwife estimated 8 lbs. by palpation. DD was born at home a week later, 8 lb 1 oz.

Every time I drive past that ob's office I want to stop in and punch him in the face.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Birth and Beyond
Mothering › Mothering Forums › Pregnancy and Birth › Birth and Beyond › Was the u/s diagnosis of a Large baby correct?