Ultrasounds and dating conception
Ultrasounds and dating conception - Sex extrime free chat live
The dating scan isn't designed to look for more subtle abnormalities, though. That will happen at your next routine scan at about 20 weeks However, some major problems can be seen at your dating scan, such as issues with the umbilical cord or with your baby's skull or abdominal wall.
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.
09 club..when I really started to think about when I last had a period... We knew the exact date of conception b/c I was on fertility meds to get pregnant. My MW had me have an early ultrasound with my last baby even if I knew when my missed period was. With my first at both my early ultrasounds the dates were within a day.
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.
I did not do ultrasounds with my last baby and don't want to with this one..know I need an accurate date...since I thought I was due late January.
I think I read that the earlier ultrasounds are more accurate for predicting due dates then the third thrimester ones based on size.
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.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. You may need a second scan to check the first scan's findings. The dating scan will also show if you're expecting twins, triplets, or more. If your cycle is irregular or you've recently been on the pill, working out the date from your LMP probably won't work. If the scan date differs from your period dates, the scan date will be used.