Ultrasounds and dating conception
Ultrasounds and dating conception - Young cam roulette
You may know when your LMP was, but not when you actually conceived. If you do know the conception date, this is counted as day 14, not day one.
I realized it had been much, much longer than I had thought. AFter a few more weeks he was right on with measurements. This time around I had an early ultrasound at 8 weeks because I didn't even get my period back since my last baby.
Before an after that there is too much individual variation. Since my M/C in Sept, I had two 42 day cycles, and two 38 day cycles, so we averaged this one at 40 and the doc actually adjusted the due date!!!! Anyway, she got the same due date I'd figured, 12/24.
Then during physical exam, she said my uterus was measuring more like 16 weeks (what!!! After losing the last preg., I was relieved to see the bean and heartbeat, then the u/s tech says, no, you measure 8 weeks. Then I came home and looked at my chart and counted back 8 weeks and there was the day I'd picked for ovulation, and that still comes out to 12/24, with the whole, you're 10 weeks pregnant but the baby is 8 weeks thing.
My second one was 5w4d, I had a sac but no fetal pole, it dated me earlier than I could have been. Not due in December, but I have not had a period "lining up" with my due date.
Number 3 through 6 have all dated the baby consistantly (7w through 12w5d). My 2nd pregnancy, I KNOW I conceived during the 2nd week of January 1999, but my LMP was Nov. Therefore, dating wheels said I was due in August, when I knew I was due in October. I think they are supposed to be fairly accurate but mine was a week off.
I'm done with ultrasounds now, I've just hit my second trimester!!! It looks like by the last period date you gave, you are about 9 weeks. Thanks for responses - it sounds like ultrasounds are somewhat accurate within a week or so... I just let it happen..there is a month's difference between Dec 26 and Jan 24. It was a week behind my date and I gave birth the day before my date and I don't go early so I think my date was way more accurate.
A dating ultrasound now should be fine, you should be far enough along to see a fetal pole, and maybe even a heartbeat (even if you ovulated a week or 2 late). Thanks for responses - it sounds like ultrasounds are somewhat accurate within a week or so... I just let it happen..there is a month's difference between Dec 26 and Jan 24. I had an ultrasound at 9w2d (by my conception day calculation) because it didn't match up with my last period (my cycles are long) and it was bang on.
This means that accurate dating reduces your chance of having your labour induced because your baby is thought to be overdue.
It may also help you to avoid feeling disappointed towards the end of your pregnancy if you think your baby is late when he's not.
The sonographer will put some gel on your tummy and move a small hand-held device (transducer) over your skin to get views of your baby.
It won't hurt, although you may feel a little pressure on your tummy.
The baby was measuring just a tad over an inch and looking just like a 9 week old should.