Can wait and see :)
There are lots of myths that are out there.
Plus people try to "help" pregnant women. An ultrasound by an experienced OB doctor is a good way to predict gender, but the most accurate test before birth is chromosome study. Most people don't want to take the risk of getting amnio without a good reason, however. Finding out at delivery if it is a boy or girl is a delight, so some just wait and see!