Asking godparents before baby is born?

soon2bmrsstarfish

Is it odd to ask the godparents before baby is born?  I did it before but it was two family members.  This time we will be asking another family member and a close family friend that I have known since she was born.  Should we wait until after?  We know the sex of the baby and have been open about his name so he already has an identity that everyone relates to.  It's not like we are saying "will you be the godmother to baby x?"