Jump to content
Very worried. US accuracy?
22 replies to this topic
Posted 27 February 2013 - 09:05 AM
I have a high chance of miscarriage so I am highly stressed.
Yesterday I had an us. My ob told me I was measuring 5 weeks exactly. According to my dates I am 5w5d.
She is quite blunt and not very reassuring. I asked her why it would be different and she said I probably got my dates wrong. As i chart I know it is unlikely. I was basically pushed out the office straigh away and didn't have time to ask any questions.
Does this variance matter?
Posted 27 February 2013 - 09:09 AM
It is so early. I went for an u/s at a normal bulk billing place when, by my dates, I was 7 weeks.
Embryo at that stage measured 6 weeks 1 day. I didn't like it, but there was a heartbeat so I tried to stay OK with it.
Shortly after at the OB, when I was 9 weeks by my calculation, her machine came up with 8 weeks 5 days.
By the time I got to the 12w ultrasound (which I had at 12w 6 days), the dates match.
Last pregnancy at 8 weeks the OBs ultrasound was almost 10 days behind what I calculated, even though there was a heartbeat.
I know its not really possible, but please try to stop worrying, its really early.
Posted 27 February 2013 - 09:18 AM
It must be very hard not to worry. I had a miscarriage a month and a half ago, so know I will stress next time around. US are variable, especially so early. Sending sticky thoughts your way.
Posted 27 February 2013 - 09:27 AM
The measurements are just an average, all babies grow differently. Hopefully it's nothing.
I would choose a different and more supportive OB if I were you.
Posted 27 February 2013 - 09:30 AM
My DD's last pregnancy by her dates was 6 weeks 1 day when she went for her first scan but there was nothing more than a yolk sac, she went back the next week and she had a 6 week 4 day embryo with a HB.
What happened in that time is hard to understand but apparently she grew 1 week and 4 days in just 6 days.
I am convinced that in the early days of implantation and growth there is a variation in how quickly they grow.
Please do not give up hope, lots of very good luck.
ETA--If this was done on a small scanner in the doctors office it is probably even less cause for concern.
Edited by soontobegran, 27 February 2013 - 09:32 AM.
Posted 27 February 2013 - 09:35 AM
I know how stressful this can be and I send you big hugs.
My 2nd bub was like this. I knew my dates etc so when at the first ultrasound he was measuring only 5 weeks 3 days not the 6 weeks 2 days I had expected I was really upset. No baby could be seen just a rather odd shaped sac and I was told not to worry, however the lady who did the ultrasound was also abrupt and not very apprachable which made me feel worse.I got the report and it said probable miscarriage but as it was only early wait and see.
2 weeks later bub had picked up! Measuring a bit closer to dates and a heartbeat, he scared me at EVERY ultrasound with things not quite right etc but now he is a healthy 3 1/2 year old.
Ultrasounds are said to be about 4 days out either way so going by that your baby is still in range.
I hope you can get a positive ultrasound soon.
Posted 27 February 2013 - 09:39 AM
If it helps, my DD was conceived with IVF and my scan dates didn't match the very exact dates I had from fertiisation/transfer etc.
Posted 27 February 2013 - 09:53 AM
I just checked on this thread and burst into tears of relief.
Thankyou so much for all your prompt replies. That is exactly what I needed to hear. (My DH is laughing telling me 'told you" as I kept him up half the night)
I know I need to stop worrying but finding it really hard.
Posted 27 February 2013 - 09:57 AM
When I had my US at 8 weeks, the technician told me I was measuring at 8w2d, "give or take 6 days". So basically it the variance can be almost a week either way
Posted 27 February 2013 - 09:59 AM
My OB told me bub was growing too slow, a millimetre smaller than he should have been at 8 weeks and I would probably be miscarrying. He's nearly 9 now.
Posted 27 February 2013 - 10:00 AM
A blood test would be helpful for you I think. Have you had one yet? It will give you a pretty good line of how things are going. They can usually get it done urgently so results are back by the next day.
Posted 27 February 2013 - 10:13 AM
At both my DS ultrasound and my current pregnancy (13 weeks) the ultrasound date was 6 days behind where I had dated. My DS grew into a very healthy boy even though the dates never ended up moving closer to my calculations. I tried not to think too much about it because I didn't want to worry. The technicians both times have told me that I must have had my dates wrong but for DS I certainly didnt (unless there is something very odd going on 'in there' that takes a week longer than normal!)
Good luck hun!
Posted 27 February 2013 - 10:21 AM
When I went in for my dating scan, I was supposed to be 7 weeks, but I turned out to be 6w 2d or 3d (I can't remember which). I was positive of the dates too as we'd only had sex the once, but who knows, the sperm may have not met the egg straight away? Then for the rest of my pregnancy, from 12 weeks onwards, DS was measuring ahead. The US tech couldn't do the NT scan because DS was too big! Good luck for the rest of your pregnancy, and as cliche as it is, try not to stress
Posted 27 February 2013 - 10:35 AM
I understand the stress about losing a little one, and am sending a hug your way.
Re the ultrasound I would definitely NOT be worrying at this early stage. I have had a lot of scans in my pregnancies due to another issue and have been told by every single scan technician to remember that the dates are just approximate, as they are only human and especially at that early stage if they are out by a fraction of a millimeter that can change your dates by a day or two. When you are in an OBs office and she is under the pump and doesn't have a lot of time to get the basic measurements it could be that she was just out a tiny bit and that explains it.
In my experience, an OB will be open with you if they see a reason to be worried about measurements. Last time my DD was measuring about 2 weeks out in her torso measurements which freaked me out, but the OB (specialist at the fetal medicine unit of the tertiary hospital) said that sometimes they are just about to hit a growth spurt so if they'd done the measurement three days later it all would have looked fine - and two weeks later all the measurements truly were matching up again.
Hope that helps, stay positive, and remember the OB would have told you if there was a concrete reason to worry.
Posted 27 February 2013 - 11:09 AM
With DD I had weekly US, she consistenly measured 1 wk behind when measured on the (older) machine used by the nurse. When I would have them on the much newer obs US the dates were spot on, so variation in dates can be related to the US machine used.
Posted 27 February 2013 - 11:19 AM
With my first scan for DS, I thought I was almost 7w but only measured 5w3d. I should have been due the 4th of the month but my EDD was pushed to the 15th! That certainly had me worried but apparently even though you can chart when you ovulate (which I had done), it can still take up to a week for full implantation to occur and sometimes even longer.
By 38w, I was told he was measuring really small and would only be about 2.5ish kg. I had him at 38w3d and he was 3.4kg, so scans are certainly not infallible!!
Wishing you a nice smooth pregnancy.
Posted 28 February 2013 - 10:49 AM
They changed my dates by 4/5 days. I knew exactly when we conceived and when my LMP was-we had been trying for #2 for 7 years so i was charting AND hubby works away. The hospital even changed the date of my LMP *rolls eyes* so its now in the paperwork as starting the day it finished! I'm just assuming that as they say she was conceived while hubby was away it was just that the girl sperm lives longer and that it took those extra days to make it's way into the egg. My 1st us showed a yolk sac, but no fetal pole, a week alter exactly there was a baby with a heartbeat of 167! I have just over 6 weeks to go now
Posted 28 February 2013 - 11:26 AM
Me too - with DD2, we only DTD once, on CD 25 or so (reallllllly late) and then they pushed her EDD back a week, which would have had me conceiving on day 1 of my period. I just assumed the egg and sperm hung round a bit, and she was born on her new EDD!
Posted 28 February 2013 - 11:46 AM
Both my pregancies have had really different measurements for the early scan.
With this one, according to my dates (using OPKs so rough idea of when I ovulated) I was 6w3d but the scan said 5w5d. We only had sex once during that time, so it would have been virtually impossible to get a positive test and to get pregnant if I were to go by the scan date.
Try not to stress too much. Good luck!
Posted 28 February 2013 - 12:01 PM
Yes I knew my exact dates and was 7wks and a day and it measured 6 weeks exactly. By the time it was the 12 week scan my dates were correct.
Posted 01 March 2013 - 06:23 AM
My scan showed my date out nilly 3weeks, I still don't understand what or how this had happeden but I'm now 31weeks along. Keep you chin up, these times are very testing for 1st tirmester
Posted 02 March 2013 - 03:04 PM
I had a scan recently when I was 6weeks 3 days. The sonographer said I was def 5weeks 3 days. 2 weeks later my Ob's scan matched my dates perfectly. When they are that small, it's so easy to measure incorrectly. I hope you get some peace of mind soon.
Posted 02 March 2013 - 03:17 PM
I measured 6 days behind for DD and 6 days for DS meaning that I got bfp's at 8 and 7 dpo respectively. I was really worried at the time and even had a follow up scan with DS but all worked out. Fingers crossed for you and best wishes!
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
Your schedule is not important to your two-year-old, and you cannot convince her otherwise. So what can you do?
A child whose remains were dumped in a suitcase in the South Australian bush is believed to have been a girl aged between two-and-a-half to four.
An Argentinian mum and politician has caused a stir on social media after being filmed breastfeeding her baby.
It was 1am on a cold winter's night when I woke suddenly to the screams of my 12-month-old son. Our lives were about to change forever.
Inflatable and portable children's pools may be required to be sold with compulsory fencing to prevent backyard drownings, with some experts even floating the idea of a ban.
At 11.07am on April 2 this year, Sarah Marriott welcomed baby Sebastian into the world.
These kids' beds definitely fit the brief of providing personality and personal space for little people who are moving up in the world.
Since becoming noticeably pregnant, my son has taken more of an interest in the sibling he'll soon have.
In this age of political correctness, it seems the one subject still subject to discrimination is that of the Only Child.
A neighbour heard a child screaming before a baby was found dead, believed to have been stabbed, in a house in Newcastle.
So far, 206 Samsung washing machines have caught fire and some have exploded. But many remain in people's homes.
We all know that having a baby can turn your life upside down - and it can also bring a raft of new anxieties and worries.
Couples using IVF may be able to choose the gender of their babies and women could be financially compensated for donating their eggs.
Not too young, and not too old. That's reportedly the best age to get married. Not everyone agrees.
After giving birth, the last thing you want to think about is contraception. But you can get pregnant before your period comes back.
Parents of toddlers everywhere know the feeling. After working up the courage to take your child out for lunch or dinner in public you are rewarded with a mid-meal meltdown.
Two children were killed when pieces from their Malm furniture line tipped over.
If you're looking to introduce an organic element into your baby's nursery but want to step away from natural timber, we have the perfect alternative.
I am in no way qualified to advise women on how to cope with hyperemesis, but I've learnt some lessons that might be worth sharing with other partners.
Best friends share everything - and for these two life-long friends, that includes family.
Samuel Forrest didn't want his wife as a trustee of their baby Leo's half million dollar trust for her own "protection", it has emerged.
Men who become fathers experience weight gain and an increase in body mass index, a measurement of body fat based on height and weight, according to a new, large-scale study
She said the photo of a boy with Down syndrome in a washing machine was taken just for fun, but no one else was laughing.
An opulent high tea at a luxury Melbourne hotel has left 44 people with salmonella poisoning - including a pregnant woman, who went into early labour.
Would you know what to do in a fire emergency? How safe is your home and family?
Prince George's second birthday has been marked by the release of an official picture showing the toddler smiling as he is held by his proud beaming father.
Is it safe to use fake tan, hair dye and nail varnish during pregnancy?
The truth is, I can no longer deny that my walking, babbling, somewhat-independent little miss is no longer a bona fide 'baby'.
I'm not usually one who believes in love at first sight but that's exactly what happened when I first saw the Cybex PRIAM.
Get your free ticket to the Sydney Essential Baby & Toddler Show for September 25-27 - register online now.
Top 5 Articles
I believe that you get out of families what you put into them, and I will give mine my all.
I have had two postnatal psychotic episodes. The first when my eldest child was six weeks old, and another after my second child was born.
French names are always in fashion, but a few have risen in popularity in recent years.
A British woman who gave birth in Spain has told of her ordeal after spending weeks trying to convince medics the baby girl was hers.
Some friends of ours say that it's dangerous to have a dog around a newborn and that we should start looking for a new home for him. Is it?
First Apple and Facebook announced they would pay $20,000 towards the cost of their female employees freezing their eggs, now IBM in the US has come up with an innovative new policy aimed at retaining female employees.
The Duke of Cambridge opened up about family life and his plans for the future in an interview to mark his first day as an air ambulance pilot.
A simple photo taken in front of an evening fire gave new mother Sarah Bowers the power to save her baby's life.
Of all the advice people told me before having a baby, no one warned me about the amount of decisions involved.
Parents of toddlers all know the moment when realise your child is being suspiciously quiet. It can only mean one thing - trouble!
If you have trouble recalling the ages of Jeremy Ryan's seven children on The Voice, you're not alone. So does he.
Getting glasses can be a formative moment in a person's life.
When a mum of six was caught shoplifting nappies, clothes and shoes for her kids, the last thing she expected was for a stranger to pay for her haul.
The risk of having uncontrolled depression is far greater than the small increased risk of birth defects that may be associated with specific antidepressants.
Police have raided properties and arrested a number of people over a brawl at a child's birthday party at a play centre in Sydney's west.
Looking for a creative way to share some big news? Look to the skies, like this family did.
Little Owen DiCandilo's name means "young warrior", and it's a description that perfectly fits the inspiring 18-month-old
The exhaustion that comes with caring for young children often means romance between parents becomes a thing of the past.
I've been fat for pretty much most of life, besides a few crazy moments of being less-fat, but for the most part I've existed on this earth with a little more meat on my bones than desirable.
Since the dawn of civilisation, generation after generation of new parents have had to rely on instinct, trial and error - and sometimes get it wrong.
Get your free ticket to The Essential Baby & Toddler Show and save $20 - register online now!