Is there any objection, halachic or otherwise, to calling a baby girl by the name the parents plan on giving it before the mi sheberach prayer is recited at the torah reading following the birth? What is the basis for any such objection?
When I named my first daughter we asked my father-in-law to suggest the name. He told me as I was at the aliya for the mi shebeirach to name her. There are several reasons.
There is a superstition that it can cause an ayin hara.
It can cause disputes in the family.
Since the naming occurs only when declared at the bris (for a boy) or aliya (for a girl), the parents can change their minds at any moment. Announcing the name before hand can then cause problems when a different name is given.
Many couples will not call a baby by any name until after the official naming for these (and possibly other) reasons.