Diagnostic Ultrasound in the First Trimester of Pregnancy

Can the scan show the gender of my baby? Examples of ultrasonography you may see used during your pregnancy. Most parents look forward to their scan because it gives them the first glimpse of their baby. You will probably be give you a printout of your baby by the sonographer as a keepsake, it is important to remember the main purpose of the scan. It is not to provide the first photo for your baby album, or to find out your baby’s sex. It is to check that your baby is growing and developing normally. Who will do the scan? Scans are usually performed by a doctors, midwives or radiographers who are specially trained in ultrasound, and are known as sonographers. Why do I need an ultrasound scan? Ultrasound has been used in pregnancy for about 30 years, it has progressively become an indispensible obstetric tool and plays an important role in the care of every pregnant woman.

Pregnancy

Will the dating scan happen at exactly 12 weeks? The nuchal test is usually done at the same time and done in conjunction with a blood test. Where do I go for my week scan?

There are other advantages to having an ultrasound at this stage of the pregnancy.

Triploidy Other defects with normal karyotype[ edit ] In fetuses with a normal number of chromosomes, a thicker nuchal translucency is associated with other fetal defects and genetic syndromes. The scan is obtained with the fetus in sagittal section and a neutral position of the fetal head neither hyperflexed nor extended, either of which can influence the nuchal translucency thickness.

It is important to distinguish the nuchal lucency from the underlying amniotic membrane. Among those fetuses whose nuchal translucency exceeds the normal values, there is a relatively high risk of significant abnormality. Further, other, non-trisomic abnormalities may also demonstrate an enlarged nuchal transparency. This leaves the measurement of nuchal transparency as a potentially useful first trimester screening tool.

Abnormal findings allow for early careful evaluation of chromosomes and possible structural defects on a targeted basis. How to define a normal or abnormal nuchal translucency measurement can be difficult.

Nuchal translucency (NT) scan

What will you do with your scan photos? 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. 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. You’ll also be able to have an earlier scan if you’ve had recurrent miscarriages NICE How accurate are dating scans?

I really do not want to know this before the baby is born.

Will I be given a risk level for any other abnormalities? What is nuchal translucency? Nuchal translucency is a collection of fluid under the skin at the back of your baby’s neck. The amount of fluid is measured during a nuchal translucency NT ultrasound scan: That’s why the NT scan is used to help screen for Down’s syndrome.

Why might I have a nuchal scan?

First Trimester Screen

It’s not offered in this health area. It’s offered in both regions to either side but it’s not offered here. So if you’d wanted it you would have had to pay for it? And they didn’t tell you that it was available if you paid for it? They did tell me, the midwife told me at my booking-in clinic that, because we only get one scan unless there’s reasons for others, which was at 11 weeks.

So she did, she told me that I could actually go and get a private scan done later on if I wanted to’.

As long as the timings are right, you can have the NT scan and blood test at the same appointment as your dating scan.

It is usually part of an assessment called combined first trimester screening. Combined first trimester screening Combined first trimester screening assesses the risk for your baby having certain chromosomal abnormalities trisomy 13, 18 and This testing combines the nuchal translucency ultrasound with specific blood tests. Nuchal translucency ultrasound alone can also provide this risk assessment, but it is not as accurate as combined first trimester screening.

Combined first trimester screening is a non-invasive way of assessing your risk, which means it does not involve putting needles into the placenta or amniotic sac, as happens with CVS and amniocentesis. This means that combined first trimester screening simply tells us if your risk is low or high. For example, it tells us whether your baby has a low risk of having trisomy 13, 18 or 21, or whether your baby has a high risk of having trisomy 13, 18 or This test gives us an indication of whether we should worry about your baby based on these results.

This means that combined first trimester screening will not give us a definitive answer.

Nuchal scan

Nothing beats the excitement of seeing the first grainy picture of your unborn baby on a scan, and during your pregnancy you’ll probably be offered at least two opportunities to watch her waving, kicking or snoozing. Guidelines for antenatal care recommend all pregnant women have a dating scan between weeks, which works out how far along you are and estimates your due date.

This is followed by an anomaly scan, between weeks, which checks your baby is developing normally. While most women have both scans, you don’t have to have any if you don’t want to.

This is to perform two biochemical tests on hormones released by the body during pregnancy on a biochemistry analyser.

Time for your week scan? Here’s what to expect So just what does happen at the week scan? Can you only have your week scan at 12 weeks? Your week scan can take place any time between 11 and 13 weeks. So you can see all his organs, muscles, limbs and bones are in place, and the sex organs are well developed too. Will I find out the gender of my baby at 12 weeks? The week scan is usually just about determining whether your baby is healthy and growing as it should be.

20 week dating scan

Children’ 1 age 6 , Occupation’ Mother – full-time mother, Father – management consultant, Marital status’ Married. We arrived for the scan, and as usual the appointments were running late. So then I was focusing on the fact that I had a very full bladder, and was feeling deeply uncomfortable and wanted to hurry up and get it over and done with, so that I could go to the loo. The lady who was doing the scan, she wasn’t a doctor so she said that she couldn’t discuss the scan with us.

If you have a previous baby with a chromosome abnormality, your background risk may be increased in subsequent pregnancies.

You may like to take a look at charts for crown-rump length , biparietal diameter , femur length , abdominal circumference , gestational sac diameter , yolk sac diameter and intrauterine fetal weight. If you have problems understanding and calculating your due date, check out and download a copy of the Ob calculator by York Winston. Hutchon’s site and the Gestation Network also provide pregnancy calculators. A large number of mails I received are about fetal anomalies, I have therefore tried to put together a Catalogue of Web pages which describe in some detail specific congenital anomalies that are diagnosable by ultrasound.

You can visit the page here. I am pregnant for 7 weeks. I went for a scan yesterday and was told I should have a full bladder. They made me drink 4 cups of water and my bladder was almost bursting at the end of the session.

Nuchal Baby Scan at 14 Weeks