Accuracy of dating pregnancy with ultrasound dating old photos hairstyles

29 Oct

When a doctor performs an ultrasound, they write a report on the findings and include two estimated due dates.The first date is calculated using the date of the LMP, and the second date is based on the ultrasound measurements. When your doctor evaluates the ultrasound results, they’ll determine whether or not these dates are in agreement.The 21 Best Pregnancy i Phone & Android Apps of 2013 Calculating your due date isn’t an exact science.Very few women actually deliver on their due date, so while it’s important to have an idea of when your baby will be born, try not to get too attached to the exact date.A repeat ultrasound will provide valuable information about the growth of the fetus and may reassure you and your doctor that the change in due date is reasonable. Ultrasound measurements for estimating the age of a fetus are more accurate during the early stages of pregnancy.In the first few weeks, fetuses tend to develop at the same rate.Pregnancy lasts an average of 280 days (40 weeks) from the first day of your last menstrual period (LMP).

If you know you had your LMP during a particular week, your doctor can estimate your due date accordingly.

Diagnostic ultrasound is a sophisticated electronic technology, which uses pulses of high frequency sound to produce an image.

This imaging enables measurement of the fetus and estimation of the gestational age.

The NICE guidelines reviewed the diagnostic value and effectiveness of screening methods in determining gestational age.

Studies identified included a Cochrane review, four RCTs and a number of observational studies.