I have a linea negra on my stomach now that i am pregnant and its going above my belly button. is it true that if it above the belly its a boy?

Linea Nigra: Science -- in the form of modern imaging technology -- is far more reliable at predicting baby's sex, but even ultrasound can't always boast 100% accuracy. Whether your ultrasound gets it right depends on a lot of factors, including how far along you are in pregnancy, the quality of the equipment, and most important, cooperation from the baby.