What does dating scan mean

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Ultrasound for fetal assessment in early pregnancy

As its name suggests, the main purpose of a dating scan is to check how advanced the pregnancy is and therefore when the baby is due. Measuring the baby can be more accurate than dating by the last menstrual period. It is also an opportunity to check the baby is alive and developing as expected, and check for twins. This scan may also be part of your screening test for Down's syndrome nuchal translucency scan. Occasionally, if the baby is in an awkward position, an internal scan may be carried out, using a vaginal probe.

We spoke to a few women who had experienced this; they were not distressed by it, though for some people it may be embarrassing. Well, one of the major things that I think we were wanting to get out of the scan was to discover that there was only one baby, because my husband is a twin and as far as I was aware, there was no history of twins in my family. But it actually turns out that my father's parents on both sides there had been a history of identical twins, but they had died so we didn't know about it, because they'd died as babies.

I actually was kind of thinking, 'Oh, well, if it was twins then what you don't know won't hurt you'. And, you know, I've never had a baby before so if I had two then I wouldn't know any different to just having one. My husband, on the other hand, was quite relieved to see there was only one, because he was of the opinion that one would have to be sold because we wouldn't be able to afford two!

So he was quite pleased. Did you know about your family history then, before you went for the scan or did it only come up afterwards when somebody said, 'Oh, yeah, we've got twins too'? It came up when I found out I was pregnant. Because my husband's a non-identical twin, so we didn't think there was much risk of any sort of genetic thing, but the fact that there was identical twins was kind of a bit of a, 'Oh, right, okay, you might have told me that beforehand.

I suppose it was very emotional, actually. It was a lot more emotional than I thought it would be. I mean, I'd heard people saying, 'Oh, you know, you're so moved' and I thought, you know, because I've seen it, when people show me scans I've thought, 'I can't make that out', and they say, 'There's the baby' and I think, 'Oh right, okay.

And then, you know, we saw this little thing, which the ultrasound technician couldn't, it was asleep at the time, so she was poking it and trying to get it to move, which it eventually did, poor little thing. So, but yes it was really quite a moving experience. And did the ultra-sonographer talk you through what he or she was doing? Yeah, yeah, she was very good actually'. Was there any point where you felt you weren't being given enough information about what they were looking at or for?

No, she was actually very, very good. I mean, I did ask when she was having a look to try and, and she was trying to measure the fetus, and I asked how many there were, because she hadn't actually said, you know, 'There's only one'. I think that's the only time I had to actually ask her anything. She was very, very good. Talked us through it. As with other scans, most women and their partners found it enjoyable and reassuring, and were relieved to see there really was a baby.

The chance to take home a photograph was valued - a charge may be made for this. Many people felt positive about the way staff talked them through what they were doing, including a woman who had seen scans before as a health professional. One woman described how special it seemed to her, whilst for the staff it seemed very routine.

They did not say much and it seemed very quick. How did that go? Did you both go? Yes, we both went. It was very, very straightforward, you know, and a fantastic experience. And we actually managed to just, to see a really good image on the screen, which looked like a baby! And it, I think that we did feel, it was very quick. That was sort of one thing that I think we hadn't quite expected how quickly it was done. And we realised that we were just one of thousands, whereas, you know, when you're actually experiencing it you're the only people in the world who are looking at a fetus on the screen of your baby.

But I think that was something I remember from it. It was very matter-of-fact from their point of view, but it was incredibly significant for us. But there was a sense of sort of relief when it was there. I suppose for me personally to see this baby was just confirmation that it was there, given I hadn't really had any symptoms, and there was no denying its existence and it was actual visual proof that there was a child there. What about your husband's feelings?

Yeah, very similar I think. Yeah, he very much enjoyed it and was excited and, you know, we got a print-off of the scan and got copies for the grandparents and that sort of thing. Did the person doing the scan communicate much with you during it? No she didn't. I mean I'm often sort of curious to know who these people are and what, you know, whether this is all they do all day every day or whether it's a broader part of their, part of a broader job and things and she didn't actually seem particularly interested in engaging in conversation.

It did feel very much of, 'Yes, you're the next on my list of people to scan'. I did note that there were sort of no introductions, for instance she didn't sort of say, 'I'm. There was not very much rapport building, I didn't feel. I didn't particularly feel I needed that personally, but it did cross my mind at the time that had I been feeling more anxious than I was, or perhaps if I'd been on my own, it didn't feel the most comforting of environments.

Sometimes the week scan is performed at the same time as the booking-in visit with the midwife, so there has been little time to discuss beforehand what might happen. For some people, the dating scan is the point when they discover that their baby has not survived. Several people described what a terrible shock this was, and how they did not feel prepared for this possibility.

And just thinking back to that first scan, what was that experience like, and how was the news communicated to you? It was a terrible shock, I think, because it was my first pregnancy. I was then very inexperienced. I hadn't even heard of, I'd heard of miscarriage and the sort of regular things that go wrong with sort of early pregnancy. So when the lady who was scanning me asked me if I was sure I was pregnant, I mean I just did not understand what she was saying.

So I mean I thought I was 14 weeks pregnant. I probably could've understood if she'd said the baby's died or there's something wrong with it. But when she asked me if I was sure I was pregnant I just, you know, I just couldn't comprehend what she was saying. And then she showed me a picture of the womb and there was nothing there. It was, I think I was in shock for about a week, I just sort of couldn't understand sort of what had happened. Did your husband come with you to the scan?

No, he didn't actually. I mean, we've always been, you know, sort of quite independent, and I actually just went with my sister. I didn't, I suppose that's one of the sort of, it was the sort of first example, I didn't see it was like a sort of massive thing. Even though I was definitely nervous, because I thought, you know, it might have died or something, you know. It might have gone wrong. But I definitely wasn't prepared for what had happened to have happened.

And then I called him and, you know, he came along and was then with me until I went home. But I think it was just the emptiness of the whole experience afterwards. You feel sort of numb with kind of disappointment and upset. And I think because I feel so dreadful in early pregnancy that it completely stops my life, so you feel like you've had - not that it's been wasted - but you know, I can't do anything, I'm just constantly sick, you know, just feel terrible, and you just feel so let down.

You just think, 'I've gone through all that for nothing, and I've got to go through it all again if I want to get pregnant again'. So it feels like quite an upheaval to get over that sort of, those feelings. And then I knew that this isn't right. And then she did an internal scan and she said - she first, when she couldn't, she said, "Oh, I can't, I'm, I'm" - I can't remember how she phrased it but she didn't say in an alarmed way, "Ooh, there's a problem," but she did say, "Oh, I'm having trouble.

Would it be OK for me to do an internal scan? So she explained when she thought, what size the fetus was and so how old it was when it had died, and offered me a photo and said, you know, she gave me a bit of information. And then after that I saw a GP as well, but that was obviously partly because there was going to be a procedure involved to, you know, I went into hospital the next day.

But she, the GP then explained what the, and they were very, I think it was dealt with in a very sensitive way then. It was very supportive. I think it was handled as sensitively and as kindly as it could have been, I think. It's more that before I had the scan, knowing what the chance, knowing that information about what the chance of miscarriage was. And that's a difficult, I can see how for a GP that's hard, if I go and I say, 'I've found I'm pregnant,' and to say "Well, you know, this is, you'll have a scan then but you must be aware that" - I know that's really hard and that people - when I've just said that, you know, I was feeling so elated and that it was very sort of mundane, but actually they could've explained why they were being quite mundane about it, I think and just sort of saying, I don't know, I think I mean, you know, and had to hare sort of, like - I don't know, what is it?

Two hundred miles down the motorway, feeling absolutely like ghastly, you know. Because they were not expecting any problems neither of these women had their partner with them, although both had taken a friend or relative instead and were glad not to be alone. One of them explained how she knew straight away from the sonographer's behaviour that something was wrong, even though she was supportive and tried not to make her anxious.

She was given a photo to keep. Another mother who had paid for a private scan was touched that the staff returned her money when the baby was found to have died. A dating scan cannot usually provide an assessment of the risk of the baby having Down's syndrome, but occasionally it can detect very obvious problems. This is something people did not feel well prepared for.

Your first pregnancy ultrasound scan is likely to be a dating scan. If you do know the conception date, this is counted as day 14, not day one. This means that accurate dating reduces your chance of having your labour induced because . A dating scan is an ultrasound examination which is performed in order to establish the do not know when the first day of your last period, or the likely day of 5 ½ weeks gestation means 5 ½ weeks from the first day of the last menstrual.

Ultrasound scans send high frequency sound waves through the uterus to allow us to assess pregnancy and fetal wellbeing. These sound waves bounce off the baby and the echoes are turned into images. Hard tissue such as bone give a strong echo and appear white in the image. Softer tissues are varying shades of grey and fluid spaces such as the amniotic fluid around the baby will appear black.

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Pettker, MD; James D. Goldberg, MD; and Yasser Y.

Women's Health Care Physicians

Author information: To determine the accuracy of established ultrasound dating formulae when used at and gestational weeks. A total of singleton pregnancies conceived after in-vitro fertilization IVF and randomized to a dating scan at or gestational weeks were studied. The mean of the differences between estimated and true gestational age systematic measurement error and their SD random measurement error were calculated for each formula. Three formulae showed systematic errors of less than Two formulae overestimated gestational age at both early and late scanning by 5.

Ultrasound scans during pregnancy

Conceived and designed the experiments: Performed the experiments: Analyzed the data: Wrote the paper: To evaluate in a national standardised setting whether the performance of ultrasound dating during the first rather than the second trimester of pregnancy had consequences regarding the definition of pre- and post-term birth rates. We determined the duration of pregnancy calculated by last menstrual period, crown rump length CRL , biparietal diameter 1 st trimester , BPD 2 nd trimester , and head circumference and compared mean and median durations, the mean differences, the systematic discrepancies, and the percentages of pre-term and post-term pregnancies in relation to each method. The primary outcomes were post-term and pre-term birth rates defined by different dating methods. The change from use of second to first trimester measurements for dating was associated with a significant increase in the rate of post-term deliveries from 2. Thereby Calibration for these discrepancies resulted in a lower post-term birth rate, from 3.

Northland's Ultrasound Professionals Phone:

A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy. Most dating scans are done with a trans-abdominal transducer and a fullish bladder. If the pregnancy is very early the gestation sac and fetus will not be big enough to see, so the transvaginal approach will give better pictures. Dating scans are usually recommended if there is doubt about the validity of the last menstrual period.

Ultrasound Scans in Early Pregnancy

This first routine scan is carried out for the following reasons: It is not diagnostic. We also like to arrange this for around 12 weeks, but it can be performed between 10 and 14 weeks. Occasionally during the scan, a miscarriage might be diagnosed even though you might still 'feel pregnant'. Jump to navigation. Website accessibility help. Ultrasound baby scans in pregnancy. Dating scan Detailed scan Further scans Department - Ultrasound. We might suggest a different date from that indicated by your last period. This is because not all pregnancies are conceived exactly 14 days after the first day of the last period.

Dating scan means

MFM mums share their stories plus expert sonographers explain why it happens and what to do if you're told your due dates are wrong. By Rachel Mostyn. Original date given was 18 December but at the scan it was moved to 31 Dec. Unless you have an early pregnancy scan most of you will be given your estimated due date at the week scan. Of course you have probably already used an online due date calculator. Weird huh?

The four most common stages to have an ultrasound

Publication status and date: New, published in Issue 4, Review content assessed as up-to-date: Diagnostic ultrasound is a sophisticated electronic technology, which utilises pulses of high frequency sound to produce an image. Diagnostic ultrasound examination may be employed in a variety of specific circumstances during pregnancy such as after clinical complications, or where there are concerns about fetal growth. Because adverse outcomes may also occur in pregnancies without clear risk factors, assumptions have been made that routine ultrasound in all pregnancies will prove beneficial by enabling earlier detection and improved management of pregnancy complications.

Antenatal Screening

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A smartphone there. To get the scan together. It was just wondering how long it took and does it take scan. Do for the scan to recover after labour. Home what it impact the later stages of their baby. You may need to do not purchase your due date, deals, mega excited!

Menu Close menu. Back to Your pregnancy and baby guide. All pregnant women in England are offered an ultrasound scan at around 8 to 14 weeks of pregnancy. This is called the dating scan. It's used to see how far along in your pregnancy you are and check your baby's development.

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