Just a fun thing...
I am 37 weeks with a bump of unknown gender, so i like to guess what it might be (I don't mind boy or girl) as it is a fun thing to muse over while I wait for baby to arrive.
My midwife reckons a baby heart rate of below 140 suggests it is a boy and that was true of my first baby. My first baby was also an up-front bump which everyone reckoned was a boy and it was.
However, she also reckons that if you have gone fat round in the face that suggests a boy.
So today at my appointment I have a baby whose heartrate is 150 - suggesting a girl, but my face has gone round so that suggests a boy... 
What give-away tell-tale 'signs' have you got/had and if you know/knew the gender were the signs spot on?