I'm 10 weeks pregnant with twins.. Can you tell from an ultrasound if it's fraternal or identical?

I'm 10 weeks pregnant with twins.. Can you tell from an ultrasound if it's fraternal or identical?
Question by °Þôt†åg€e¥ñåîGîrl°:
I'm 10 weeks pregnant and had one ultrasound at 6 1/2 weeks (that's when I found out I was pregnant with twins) and another one at 9 weeks. Can I tell from the ultrasound that the twins are fraternal? They have two different sacs and twin B seems to be younger because the yolk sac was still present in the 9 week ultrasound, Twin B had no yolk sac.

ultrasound physiotherapy