Dating sonogram dating site internationa
The point of the scan is to work out how many weeks pregnant you are. Ectopic pregnancy and miscarriage: diagnosis and initial management CG 154.
You may have calculated the length of your pregnancy from the first day of your last menstrual period (LMP).
Your eight week ultrasound can be an exciting and apprehensive moment.
If this is your first ultrasound you will be understandably anxious.
If you do know the conception date, this is counted as day 14, not day one.
This means that accurate dating reduces your chance of having your labour induced because your baby is thought to be overdue.
Screening for Down's syndrome will happen at the dating scan if: The screening test for Down's syndrome used at this stage of pregnancy is called the combined test.
The combined test involves a blood test and measuring the fluid at the back of the baby's neck (nuchal translucency) with an ultrasound scan.
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.
You may know when your LMP was, but not when you actually conceived.