Gender scan with twins

Bethan • Married 4yrs with 4yr old Boy. Pregnant with TWINS!!! after TTC 2 months. Very nervous about this time after awful pregnancy and terrible labour & birth.

We going for a gender scan in 3 days. I'll be 16 & 2 with fraternal twins.

How good where they at telling the sex of both babies. People keep telling me they'll only usually be able to tell one. I don't want to just buy white until their born.

What's everyone's experience with early gender scans?