I didn't have any heartburn & my son was born with hair

If it's SUPER F**KING PAINFUL, 11 out of 10 pain with nothing that can help it or where pain starts radiating to other places it could be something, but if it's painful but you can live with it and antacids help then it shouldn't be a big deal.

There have been studies behind it that show there is some accuracy behind it.

Definitely not true that your child will have a lot of hair. I had terrible heartburn but my son had like no hair at all.

It's an old wives tale not always true

A lot of people keep telling me , that means I'm have my baby full of hair @aek91

They say it means baby will have a lot of hair

Nope