I'm 11 weeks and my NHS nuchal is booked for 10 days time. Unfortunately last week we were told that I had been carrying twins but one died at 8 + 4.
Because of the lost twin, my hospital will probably not be able to offer me the combined nuchal test, since the blood results may be compromised/skewed by raised hormones due to the fact it was a twin pregnancy. NHS guidance backs this up. So risk will be calculated on nuchal measurement alone which is less accurate.
However, the Fetal Medicine Centre (where the list twin was discovered) will offer me the combined test, and assure me this is ok. 
So, could I have the nuchal at FMC and still go to my NHS one the following week?
Thank you