Nope! :-)
These things are probably more related to the individual woman, and her (or others') perception of things. Same thing for carrying high/low, speed of the baby's heartbeat, etc., etc., etc.
I have two boys, and my first had a "fast" heartbeat so my sisters thought "girl" -- wrong! I also did the "ring" trick with him, and it swung "girl," but was obviously wrong. Also, I would have people come up to me while shopping and say, "Oh, you're carrying high - you're going to have a boy!" and the next person would tell me that I was carrying *low*... which meant that I was going to have a boy. And the next day, strangers would tell me I was carrying both high and low, and that meant I was going to have a girl! Just smile and go on. :-)
My sisters weren't sick with any of their pregnancies, and they had both boys and girls; I was a little sick (mostly in response to specific food smells), but nothing major; one of my friends gets pretty bad sick, but it may be partially due to the baby's blood type being incompatible with her own (the pregnancies she's felt the best were those that had her type [A], whereas she nearly was hospitalized in her first pregnancy, with a type B baby, due to the vomiting she had; it wasn't so bad with her AB baby, but worse than with her Type A babies); and another friend has hyperemesis gravidarum, even though both babies are of a compatible blood type. So, go figure!