Nausea with boy, but not girl?

Apparently there’s an increased risk of nausea with girls than boys. I thought this was an old wives tale until I saw that ACOG lists this as a risk too, so now I’m curious. I’ve had morning sickness with both of my boys, but am now 8 weeks with no morning sickness at all. I’m a little worried for a missed miscarriage too… but anyone have nausea with their boy but not their girl?