Should I go by her dating or stick with what I know to be the date of conception? Ultrasound dating is usually only very accurate until the 12 week mark...
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 scan can check that your baby's heart is beating nicely and that he's developing normally.
my 10 week 3 day ultrasound showed me at around 10 weeks 6 days...
dating from the first day of your last menstrual period or date of known conception is what most Physicians will go on. and hey, chances of your little bundle of joy arriving on your actual due date is only 5% anyway.
It's wonderful to see a little blob with a heartbeat that will become your baby. If you are unsure of the first day of your last period you will be offered a dating ultrasound when you are between 10 and 14 weeks pregnant.
But ultrasounds can also lift the lid on a few worries you might be having. The main reason for the ultrasound is to work out how many weeks pregnant you are, and to estimate your due date.If you can't remember your last menstrual period date or if you have consistently irregular cycles, the doctor can use an early ultrasound to give you a fairly reliable due date.If your first ultrasound gives you a due date that is more than 1.2 weeks away from what was expected, there is a good chance that everything is still fine.Due to having wavering periods, I never really keep track, and therefore I don't know when my last period was.I can give an "estimate" but I really don't know because I never keep track.However, conception doesn't actually occur until around 14 days after your LMP, or later if your cycle is longer than 28 days. Multiple pregnancy: antenatal care for twin and triplet pregnancies CG129.