a few months back a friend of mine recieved her scan results and then she told her mother in-law she was having a boy.the old day got upset and told her it was a sin/an abomination to check for the gender of an unborn baby.How true is this?

It's not a sin to check the gender of your unborn baby, Some people prefer to know so they can prepare for the birth, it's all down to choice,

yea...

but our mothers and grannies will tell you that ,during their time, such facilities did not exist or rather they didnt have it then , and they still prepared for the birth of their baby.

whats your take?

It's a matter of choice. I see nothing wrong with it...