That's all old wives tales. There's no way to actually be able to tell... since there's only two genders the baby can end up being, its a 50/50 chance of any of the tales to be true...
Every woman and every pregnancy is different.. so just because its one way for one woman doesn't mean it will be the same for you..
Its hard to tell on most woman. Everyone thought I was having a girl but i'm having a boy :) with a girl you get big from everywhere and a boy you carry low. Plus in my case from the back view you can't even tell i'm pregnant. Lol