Pregnancy & Birth Clubs <
20/06/2013 at 14:44
Hope no-one finds this sensitive me asking, but can anyone tell me a bit more about the 12 week scan?
I know it's to check that the baby looks like it's developing ok and I've seen alot about the nuchal in terms of testing for Downs Syndrome, but from my time on here I know there are a number of other symptoms etc and wondered if these are all tested for/checked at 12 weeks? I got a book from the midwife, but tbh it only really mentions DS.
I know they measure the fluid at the back of the babies neck, then do they review that along with blood tests? I take it then you have to wait for results if it's linked to bloods, but can they tell you if the baby might be at higher risk at the scan? How does it work with the bloods, is it a case of they might see something at the scan and then sort of 'confirm' that the bloods are showing a similar picture or could the scan look fine but the bloods come back with a different picture.
Sorry, would just like to know a bit more before I go.
20/06/2013 at 14:46
My sonographer said that things look good but I'll get results in about a week. I think from that they have a rough idea
20/06/2013 at 14:55
The neck measurement is the first indicator. Like Custard, the sonographer told us the fluid was in the "normal" range. A blood test gives you a ratio of likelihood. I think mine was 1:25,000 so low risk.
20/06/2013 at 15:04
When I had my 12 week scan they had my blood results already back so could give me a ratio of risk straight away (but I don't think this happens everywhere).
The print out showed DS risk and also some of the other symdromes.
They only check the measurement of baby for dating and the heartbeat. The detailed anatomy scan is at 20 weeks.
20/06/2013 at 15:10
I was really nervous about mine, after stories I had read hear and an experience my SIL went through! What threw me first was that they called me through and that was just to take my bloods, I thought they would do this after for some reason. Mainly because I really needed the loo!
I had a great scanographer (!!) who got straight down to business, "there is your baby and there is it's heatbeat" They were the 2 things i was waiting to hear!
After that we just watched it wiggle around as she tried to get a it to stay still to get a photo.
she wanted to measure it from head to toe to date it and then take the measurements at the back of the neck. I think she said it looked great but i can;t honestly remember!
They take the neck measurements and the blood tests together to work out the chance of risk. We got a letter just a few days after with the results.
I think the blood that the midwife takes at your booking in is used to test for a lot more things. I remember a big long list!
I think even if they see something on the scan they would want to wait until the blood results!
It really is an amazing experience, enjoy it!
20/06/2013 at 15:30
Did any one else not get a ratio for how low/high risk they were? I just got a letter in the post about a week later saying I was low risk but I'm still not sure how this translates?
20/06/2013 at 15:53
Thanks all. Mrs V, I know it's not the full check, I meant more that they check the baby is the right sort of length for dates and the limbs are developing etc. I've not had any bloods taken as yet, so I just get them done on the same day as well as giving a urine test (also not done this).
Rusty, in terms of your ratio, do you know how it's worked out? I tried to read about it online, but it's confusing and all I could find was some 'stat's' linked to age. There was a figure for being 30 (which I am) does anyone know if this is the 'best' result that I should get or is it totally unrelated? So if it said my likelihood was say 1:900 from being 30, does this mean the best my test should come back is that result?
20/06/2013 at 15:59
MissDeeDee- After my scan I then saw a midwife who took bloods but didn't ask for a urine sample.
20/06/2013 at 16:02
I think age is a factor, I think its something like 1:900 for DS for a 30 year old but my overall result was something like 1:2500 so you can have better than your age statistics (if that makes sense?).
20/06/2013 at 16:13
Thanks Samjh, my midwifes already said she will take a urine sample and blood sample.
Thanks Mrs V, that's exactly what I was meaning, could the result come back better or would it never be higher that 900 or whatever it is for my age.
Sorry, don't mean to sound obsessive about this, I just wanted to know what the process was before I went x
20/06/2013 at 18:11
The sonographer will measure the fold at back of babies neck. He/she will explain as they go along what they doing - like a running commentary. He/she might freeze the iimage on screen to grab the measurement before going back to a 'live' image. More than likely you will see on screen what it measures. I noticed that my babies was 1.6mm for example. I believe under 2mm is low risk. Over 2mm is higher risk.
20/06/2013 at 18:21
It's not just downs they are testing for. This is a common misconception they measure the NT measurement at the back if the neck anything over 3.5mm is high risk. If high risk they offer you further testing, no further testing and continue regardless or termination there and then. We opted for further testing. Our NT was 5mm so they didn't do bloods as obviously anything over 3.5 is high risk, some hospitals still take the bloods to give you a downs ratio but tbh I found that pointless as there was clearly something going on with an NT of 5.
The sonigrapher should tell you the nt measurement at the scan. We asked for all other markers too due to our history and they checked all those, our 12 week scan was over an hour with Isaac,
Our downs risk with Isaac was 1:20000 which I was happy with, my consultant and screening mw said the highest ratio with a downs baby they had seen was 1:4000 which made me feel more positive
Nuchal isn't just downs though, it can signify issues with the heart, rare genetic issues, turners, Edward and pateus so really downs is your best case scenario iykwim
20/06/2013 at 18:23
If you want more info have a look on arc, they are a fab organisation who explain all testing
20/06/2013 at 18:27
Sorry meant to say the measured our nt it was 5, we were immediately told it was high risk and all options fully discussed and a very in depth counselling session that sane morning. They check crown to rump length to get accurate date to gauge the nt measurement, they can't measure nt before 11+2 or after 13+6
20/06/2013 at 19:26
I can't add much in terms of how the measurements are done and what your bloods are for, but just wanted to say don't worry too much about the ratio numbers either. Low risk is low risk but people's numbers can vary wildly. My result came back as 1:50000 but a low risk result could also be 1 in 5000, or a smaller number than that.
20/06/2013 at 20:43
CP thanks for that. I knew they were looking for other things but wasn't sure if this was part of the nuchal or seperate tests.
Thanks to everyone for your posts, it's good to know what's going on x
20/06/2013 at 21:05
Our hospital doesn't give you your exact results - they simply give low risk or high risk - unless you specifically ask for it.
20/06/2013 at 21:13
Our experience was the same as cp, our measurement was 5.5 and told straight away we would get a high risk back from the downs risk, but they rushed our results through so they could progress with further tests, our risk was 1 in 5, although ended up being turners. I wasn't given very much info at the scan just told there was a risk, I even went back to work afterwards trying to be positive,
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