Measuring 2 weeks behind…

posted 3 years ago in Pregnancy
Post # 2
Member
2168 posts
Buzzing bee
  • Wedding: October 2013

You may just have a petite baby! I have two people close to me that had to do later anatomy scans to remeasure and their babies were just smaller and completely healthy. Try not to worry yourself too much ❤️

Post # 3
Member
337 posts
Helper bee

Is it possible she was going by fetal age instead of gestational age? I know when I went in for my ultrasounds they always quoted fetal age regarding measurements. Did they officially change your due date? 

Post # 4
Member
4998 posts
Honey bee
  • Wedding: September 2013

MsCandyGirl :  I assume you just got your LMP/ovulation date wrong and the baby is fine. Mine measured 5 days behind at my anatomy scan (and I did IVF so the dates are right), and they didn’t seem too concerned. As long as he/she is growing and has a strong heartbeat, I think you’re fine.

Post # 5
Member
9435 posts
Buzzing Beekeeper
  • Wedding: August 2012

Did you have a dating ultrasound done early in your pregnancy? What about the NT scan?

Post # 6
Member
9811 posts
Buzzing Beekeeper
  • Wedding: September 2013

Have you had any earlier scans or is this your first?  Dates can easily be off if you have slightly longer or irregular cycles, do you have longer than 28 day cycles?  I went in for an ultrasound at 12 weeks and baby was measuring almost 16 weeks (and no, was not just a big baby).  Ultrasounds done between 14-21 weeks have a +/- accuracy of 7-10 days.  Which means that you can be up to 7-10 days off in either direciton and they will not change your due date, it is just normal variation.  This means you could have simply ovulated a week later than you thought you did, but everything would be normal.  But this also depends on if you had any earlier ultrasounds that confirmed your expected due date?

Post # 7
Member
2902 posts
Sugar bee
  • Wedding: June 2013

The second trimester is a time when ultrasound dating begins to be less reliable, in my experience. With my son, I had an u/s at eight weeks where he measured exactly eight weeks, then another at 12w1d where he measured 13w0d. At 34w3d he measured 37w0d, he was born at 37w3d weighing 9lbs 9oz and measuring 21.5″ and he’s been off the charts for height ever since. If you or your husband are on the petite side, you might just be having a petite baby! I wouldn’t worry too much. 

Post # 8
Member
4232 posts
Honey bee
  • Wedding: September 2015 - Hotel Ballroom

I am currently pregnant with baby #1…so I totally get how that could be worrisome!

My SIL was the opposite. They thought my niece was TOO BIG! They moved up her due date about five or six times. At one point they thought my niece was 11 lbs, and did an emergency c-section over a month early thinking that my niece was in fact ‘done cooking’ and was in trouble….turns out that not only was my niece ‘only’ 9 lbs…she was just a really fat baby. So now technically my niece was a ‘preemie’. FYI she was fine…but what a headache!

Measuring the baby in utero is NOT a perfect science! Look on the bright side, this means you get to see your baby again in for weeks 🙂

Post # 9
Member
2021 posts
Buzzing bee
  • Wedding: September 2013

Was this the first ultrasound? Do you know what day you ovulated exactly? 

Post # 10
Member
899 posts
Busy bee
  • Wedding: April 2015

If the doctors aren’t worried then try not to stress. It’s possible baby is measuring small it’s also possible you were off with your dates or it’s a bit of both! I had a scan at 6 weeks and I measured I think 9 days ahead of when I know it should be from when I ovulated then a 10 week scan I measured ahead by 7 days and at 12 weeks ahead by 6. I am 100% sure when I ovulated but baby isn’t matching up with that. They grow at their own speed. Also later scans aren’t as accurate for dates. If you think about it they cant all measure the same as they aren’t all born the same size. Some babies are 18inches long at birth some are 23 inches. 

Post # 12
Member
2942 posts
Sugar bee
  • Wedding: May 2014

MsCandyGirl :  If we went by my abnormal periods, my baby would be two weeks behind the “estimate” too.  I lied to the doctor and told them I didn’t remember my last period date, because I knew my conception date, and it wouldn’t track normally. I had dating ultrasounds, 3 of them, and the growth curve between them and my anatomy was great.  That is so much more important, that your baby is growing.  

Also, doctors have a hard time finding my LOs heartbeat because my baby likes to move like he is throwing a dance party.  24 weeks is the first time they found it in under 5 minutes.  They gave up and sent me to my ultrasound at 20 weeks.  

Post # 13
Member
341 posts
Helper bee
  • Wedding: August 2014

Both my babies measured a couple weeks behind throughout.  They were just teeny!  I was told they only “worry” if the baby measures 3+ weeks behind or ahead.  

Post # 14
Member
9435 posts
Buzzing Beekeeper
  • Wedding: August 2012

If I had gone by my LMP I would have been off by like 3 weeks. I knew I ovulated late because I used OPKs and didn’t get a BFP until CD41, but I probably would have been really worried otherwise.

I wouldn’t fret if this is the first scan you had. You probably just ovulated a bit later.

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