This
sci- fi stuff ... happens only in India :-* !!!
I my self have a BC from Municipal Corporation.. it doesn't have name ... only says "
male" child + parents name + DOB + place of birth etc.etc .
Its quite common having such nameless (male child/ female child) BC... Most of Indians born in early 80's or earlier got it like that.
As you rightly said the BC confirms the fact that a male child is born !! But if your parents have not registered your name at the time of registering it.. or within a matter of couple of yrs or so.. then you're gone !!
Those BC cannot be amended (adding name of that so called 'male'/ 'female' child), the Department guidelines restrict it at this stage (i think >15 yrs)