How accurate is 12 week dating scan

Posted by / 04-Dec-2017 13:32

How accurate is 12 week dating scan

If the heartbeat cannot be detected then more tests have to be done, but this does not necessarily indicate a problem: the baby’s position and other factors can obscure the results of an ultrasound.

An experienced sonographer can often find any major irregularities like limb deformities.

As medical professionals have a precise idea of the baby’s development over nine months, knowing the foetal age makes it easier to judge if everything is fine with the baby.

The scan also gives a due date, which is sometimes a small range of dates due to a difference with your own dating attempt.

But thats not until 21st April when I make myself 17 weeks! This is normally done in the consulting room for a small out of pocket cost.

For instance, if your period starts on the 5th April, then your estimated due date for delivery is the 12th January.

When you are offered a dating scan and the sonographer gains a picture of the baby’s development, they can use this to accurately calculate the baby’s age based on their size and formation.

This allows more precise timing for later scans, doctors’ appointments and check-ups on both mother and baby.

For these purposes, the sonographer looks for the foetal heartbeat and any currently visible abnormalities.While many women will have a good idea of when they had their last menstrual period, another portion will be far less certain.This can be due to a number of factors, including whether the pregnancy was planned or not, and if the mother often has irregular periods.An accurate due date is crucial so that, in the event of being overdue, your doctor knows whether you are drastically overdue or simply a few days late.As the scan is designed to assist the doctors’ understanding of the foetal age and when the baby is due, determining when this early scan takes place is occasionally a matter of estimation.

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I didn't know that When the scan showed a 9lb at 39 weeks I asked to be induced and had a wonderful delivery.