its the amount of fluid loves, there's always fluid there that's how meningitis is checked for through out our life's @momtobe0418

so if theres fluid, theres a chance? do all babies have that fluid behind their neck? @owynngenesmommy07316

they did it to me also since my first son had it and I lost him before I was full term. its a second step test, first the ultrasound then blood work.

they were checking the fluid that's around and behind your babys spinal cord, its an early sign for spinal bifida

If the measurement is below 3 you're fine

It's called neucal translucency

They were more than likely checking your amniotic fluid. It's nothing to be worried about.