Husband can't make it to gender ultrasound

Jessica

So my husband can't make it to my gender ultrasound. He works for the hospital right across the street, but he will be in the I.V. room, so not even a cell phone on him to facetime. The gender appt is our 1st wedding aniversary so what I was thinking was having the doctor write it down on an envelope and we could open it together, but the more I think about it I want to find out before him and have blue or pink balloons all over the house when he gets here.

What ideas do you ladies have for me? Should I stick to the envelope?