When YOU come up with a proposal [hopefully others will give some advice to give you some ideas too], think about how you'll say it to your husband, and then talk to just him about it first. Then, it probably would be best having him tell her. To back yourself up, check with whoever is supposed to be doing the ultrasound for you- to see if mom, dad, sisters, neighbors, cousins, and friends from the 7th grade are all invited to come along. My doctor sends his patients to a separate clinic at the hospital for the ultrasound. For liability reasons, fire hazard reasons, etc. they may only let immediate family in. At that hospital where I delivered, my mom thought I'd love to have her watch me pop a kid out from between my legs and didn't take no for an answer until I found the policy where it states only one other person can be in the room [which case I chose my husband, of course!].This ultrasound they'll do on your belly, unlike the first one they probably did with the rod-like camera in your vagina. So it really isn't so bad, but I know what you're saying about just having your husband there. Even so, it should only take about an hour for them to check the sex and check all the organs and measurements, so if they're making a big trip from out of town, it would be kind of a big hassle. Just throw it out there that you want to wait until the actual big day for visitors and festivities.