Obstetric dating scan viability 30 year old dating younger man

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.

We suggest that you go about your normal daily routine but just not empty the bladder half an hour before the scan.

There is a small chance that a transvaginal scan may need to be performed in order to get a clearer view.

Some patients prefer this method of scanning as the resolution of the image is better, improving the accuracy of the measurements and the clarity of the pictures.

Feel free to request this as there is no extra charge.

All pregnant women are offered an ultrasound scan at around 8-14 weeks of pregnancy. It's used to see how far along in your pregnancy you are and check your baby's development.

Your midwife or doctor will book you a dating scan appointment.

This is because it is the longest portion of the embryo’s body and provides an ideal measurement baseline of growth and development.

Early Pregnancy Scans are not routinely offered on the NHS but you may have one privately without affecting your NHS entitlement.

Sometimes it is requested by a doctor or midwife to confirm that your pregnancy is healthy (in this case your scan is often called a viability scan) and to calculate the date when your baby is due (usually referred to as a dating scan).

Crown/rump length and gestational age are closely compared with each other until around the end of the first trimester.

The ideal time for a sonographer to assess the gestational age in the first trimester is between 7-10 weeks of pregnancy.