i've had nausea with all 3 of my kids and my current pregnancy, have a girl and 2 boys already, don't know the sex of this baby, but as the above posts say it's no indication at all of the sex the amount or lack of nausea. try the wedding ring on a string over your belly that might work better, if the ring moves in circles it's supposed to mean girl, if it swings back and forth that means a boy.
nausea or no nausea not AT ALL related with boy/girl.Only ultrasound will tell .
My mom never had nausea/vomiting and had 4 girls. Symptoms or lack of are just a reaction to the hormones in your body, it doesn't mean it tells what the gender is.