Early ultrasound for pregnancy dating
Scans in early pregnancy are usually performed in the first trimester around 12 weeks.You may have a earlier scan, if you are experiencing pain or bleeding for example or unsure of LMP dates.During your visit we will thoroughly explain every stage of the process and what you can expect.We are always happy to try and answer any questions.Transabdominal ultrasound cannot reliably diagnose pregnancies that are less than 6 weeks gestation.Transvaginal ultrasound, by contrast, can detect pregnancies earlier, at approximately 4 to 5 weeks gestation.This is available on the NHS, although not all hospitals routinely offer the more accurate combined test that we use which includes a blood test to increase accuracy to 95% (when performed by a suitably accredited FMF operator) The only way to achieve a 100% accurate diagnosis for Down Syndome is to have diagnostic genetic testing performed via a procedure such as a CVS or amniocentesis. However if you are looking for the most accurate Down Syndrome test but want to avoid the risks associated with diagnostic testing?
Your results are presented in a two-page printed report for you to forward to your GP/midwife/obstetrician.
An early pregnancy scan will: You can have an early pregnancy scan any time from 5 weeks to 11 weeks and 1 day into your pregnancy.
These dates are calculated from the first day of your last menstrual period.
First trimester ultrasonic scans may show 'soft' markers for chromosomal abnormalities, such as the absence of fetal nasal bone or an increased fetal nuchal translucency (back of the neck) to enable detection of Down syndrome fetuses.
While your sonographer takes measurments they will explain what you are looking at.