We didn't find out. I never wanted to but DH did. At the u/s we got the sonographer to write it down and seal it in an envelope just in case we changed our mind. We have not touched that envelope since as we now both think it's going to add even more to the excitement that we will experience in 7 weeks time. Once you find out you can't take that back. Just my opinion. There are times when it would have made things much easier knowing, but i tell myself it is just a guess with a 50/50 chance of getting it right anyway, i will know with 100% certainty very soon.