We'll be surprised. We'd been surprised with the first two and liked it that way. My reasoning: I don't work well with things unless they are guarantees so even when a tech says "I'm 95% sure it's a ____" I'd be the kind of person that would worry that they were wrong and wouldn't fully be able to believe or get excited about what the baby is. For me, it's such a motivator during labor to think, "I can't wait to find out if it's a boy or a girl." It's nice to be able to meet your baby and see what he/she looks like but at first, the biggest thing is just knowing whether it's a boy or girl. I also loved the moment when the baby comes out and having dh announce the sex. With our last baby, I was convinced it was a boy. So when she was born, I checked to see what she was and just kept saying, "It's a girl? I can't believe it's a girl!" It was just a moment I'll never forget. I also think it's fun guessing the whole time what I think the baby is and I think it's more fun for family and friends not knowing. I know with my SIL, she did not find out with her first and did with her second and with her first, it was so exciting for all of us to have them announce, "It's a girl!" but with the second, there was sort of this lack of a big moment because BIL just came in "she's here!" Of course, that's exciting that she was there, but we already knew she was going to be born and knew the sex and name and everything and it was just a little anticlimactic. So I think it's fun when others don't know and I have fun sharing the news with them too after the baby is born.