Accuracy of pregnancy dating ultrasound six months dating gifts
It was a very confusing hour and I'm just now coming out of the fog! I had a dating ultrasound in the ER when I found out I was pregnant, and I have no idea when I conceived.It said I was then 5w5d, and I've often wondered if I were actually further along (due to symptoms) or if this is just the way third pregnancies are sometimes.
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. I only say that b/c I had one at 6.5 weeks and he was only measuring 5.5 weeks. Thanks - Traci I think early U/S are accurate as long as your past the 7/8 week mark.Generally, ultrasounds which are performed in the first trimester are within 3-5 days of being accurate in terms of assessing gestational age.This is because although every little embryo is unique, there are still defining characteristics of development which apply to all embryos at particular stages of early gestational development.
As the embryo matures to a foetus, individual genetics and growth factors influence its growth.