How likely is it for...

An ultrasound tech not to find a twin on a 14 week ultrasound.

I just saw a post on another app. Of a girl "claiming" that she had an ultrasound done at 14 weeks by an ultrasound technician, and the lady apparently missed a twin. And she didnt find out until her 20 week ultrasound.

That seems VERY unlikely and untrue. I feel like shes just trolling for attention or something.