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Log in Sign up. Community groups. Home Pregnancy Health Antenatal scans. In this article When will I have my dating scan? How accurate are dating scans? What else will the dating scan reveal? What happens at a dating scan?

What is a dating ultrasound scan

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Ultrasound - What to Expect (UW Medicine)

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The first scan is sometimes called the dating scan. The sonographer estimates when your baby is due (the estimated date of delivery, or EDD) based on the baby's measurements. The dating scan can include a nuchal translucency (NT) scan, which is part of the combined screening test for Down's syndrome, if you choose to have this screening. Dating scans are a type of ultrasound scan performed during pregnancy. They are usually performed before 15 weeks. The scan can detect your baby's heartbeat, birth date and weight. Learn about dating scans on the HSE website. A dating scan is carried out by ultrasound. A sonographer, who is usually a radiographer or a midwife trained in ultrasound, will complete your scan. If the scan is after 10 weeks, ultrasound recordings are usually made through your abdomen. The sonographer will put gel on your abdomen and move a hand-held device called a transducer, back and.

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Can your pregnancy scan give the wrong due date?

See all in Video. You might also like You might also like. Why has my midwife suggested a growth scan? Scans to check the position of the placenta. Looking after your skin on holiday. What will happen at my first pregnancy scan?

When will I have my dating scan? You'll have a dating scan, also known as a week scan between about 10 weeks and 14 weeks of pregnancy. For most mums-to-be, this is their first scan (NICE , Newson ). You'll only have a scan before this, between six weeks and 10 weeks, if you've experienced bleeding, pain, or problems in a previous pregnancy (Miscarriage Association nd). Mar 27,   "If the scan date differs from your LMP dates, then the scan dates will be used, but do discuss with your midwife if you are concerned. The best time to establish this date is at the scan you are offered between 11 weeks and 2 days and 14 weeks plus Author: Rachel Mostyn. The dating scan will take between five minutes and 10 minutes. Nearly all scans after 10 weeks can be done through your tummy, and most units ask you to come with a full bladder. The sonographer will put some gel on your tummy and will move a small hand-held device (a transducer) over your skin to get views of your baby.

Get the BabyCentre app. Canada France Germany India Malaysia. Connect with us. However, the accuracy of the ultrasound examination is always dependent on the skill of the sonographer and the quality of the equipment.

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The EDD from the early dating scan is used - if the last menstrual period is not known or is unreliable, or the dating scan differs from the last menstrual period dating by more than 5 days. Ultrasound examinations from 12 to 22 weeks are regarded as being within 10 days of accuracy or up to 10 days earlier or 10 days later than the woman's calculated due date.

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Ultrasounds performed after 22 weeks gestation cannot be used to estimate the due date of the baby because the size no longer reflects the age very well. Even average babies can differ by up to 2 to 3 "weeks of growth". These scans are only used to estimate the due date of your baby if this is all you have to go on. If you have more than one ultrasound during your pregnancy, giving you 'multiple dates', then the earliest ultrasound estimate should be used, because it will be more accurate.

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If you have any questions about this, please feel free to talk to your sonographer or doctor about it. Make An Appointment.

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Find Us. We know you may have c oncerns about Coronavirus. We are open during this period. However, the sonographer may not be able to get good views if your baby is lying in an awkward position or moving around a lot. If it's difficult to get a good image, the scan may take longer or have to be repeated at another time. There are no known risks to the baby or the mother from having an ultrasound scan, but it is important that you consider carefully whether to have the scan or not.

This is because the scan can provide information that may mean you have to make further important decisions. For example, you may be offered further tests, such as amniocentesis, that have a risk of miscarriage.

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Hospitals in England offer all pregnant women at least 2 ultrasound scans during their pregnancy:. The first scan is sometimes called the dating scan. The sonographer estimates when your baby is due the estimated date of delivery, or EDD based on the baby's measurements.

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The dating scan can include a nuchal translucency NT scan, which is part of the combined screening test for Down's syndromeif you choose to have this screening.

It is sometimes called the mid-pregnancy scan. This scan checks for 11 physical conditions in your baby. Some women may be offered more than 2 scans, depending on their health and their pregnancy.

No, not if you do not want to. The week dating scan and week scan are offered to all women, but you do not have to have them.

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Your choice will be respected if you decide not to have the scans, and your antenatal care will continue as normal.

You'll be given the chance to discuss it with your maternity team before making your decision. Most hospitals do not allow children to attend scans as childcare is not usually available. Please ask your hospital about this before your appointment.

Remember, an ultrasound scan is an important medical examination and it is treated in the same way as any other hospital investigation. Ultrasound scans can sometimes find problems with the baby. Most scans show that the baby is developing normally and no problems are found.

When will I have my first scan?

This is because most babies are healthy. You can continue with your routine antenatal care.

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If the scan shows your baby is more likely to have a condition, the sonographer may ask for a second opinion from another member of staff. You might be offered another test to find out for certain if your baby has the condition. If you're offered further tests, you will be given more information about them so you can decide whether or not you want to have them. You'll be able to discuss this with your midwife or consultant.

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If you want to find out the sex of your baby, you can usually do so during the week mid-pregnancy scan but this depends on the policy of your hospital. For example, if your baby is lying in an awkward position, it may be difficult or impossible to tell. Some hospitals have a policy of not telling patients the sex of their baby. Speak to your sonographer or midwife to find out more. You will need to check if your hospital provides this service.

The person performing the scan is called a sonographer. You may need to have a full bladder for this scan, as this makes the ultrasound image clearer. You can ask your midwife or doctor before the scan if this is the case. The dating scan usually takes about 20 minutes. Find out more about what happens during a pregnancy ultrasound scan. A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy. Dating scans also reveal other important information such as: the number of fetuses and gestation sacs. the presence of a heart beat. the size of the fetus, from which the . The dating scan is an ultrasound that can be done from seven weeks of pregnancy but they usually happen a little later. It's the best way to predict your due date (Butt and Lim , PHE , SOGC , Van den Hof et al ).
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