How accurate are dating scans in pregnancy dating a divorced man with childres
In addition to foetal measurements, this initial scan provides an opportunity to assess the baby’s health.For these purposes, the sonographer looks for the foetal heartbeat and any currently visible abnormalities.While many women will have a good idea of when they had their last menstrual period, another portion will be far less certain.
anyway scans are only a guide on gestation, i know the EXACT date i ovulated (as i used a donor) so i was charting my temps and scans can be 5 days out either side.
I also know the day of conception but my dating scan says 2 days on top of that..
which is why i ask is it from conception or implantation as maybe if its from implantation we could have caught from a much earlier bd, maybe taking 5 or 6 days to implant...
These are basic calculations such as the length from crown to rump (head to the end of the bottom), the femur length (longest bone in the body), and the head circumference.
Some of these and other measurements are most useful after 13 weeks, which is beneficial for a late dating scan.
LMP is only used until the dating scan as it's the best guess until they measure the baby.