Is it true that sleeping on the right side is a symptom indicating that you are having a baby girl? I have heard this belief and would like to know if there is any scientific basis for it.

Sleep in on the right side does not guarantee a girl child but it a myth. The best position to sleep is the left side...so try as much as possible to sleep at the left often not right.you might wake up seeing urself at the right but change position as soon as you find out