bhava (kammabhava, upapattibhava) and jati How is the connection between bhava (as kamma-bhava and upapatti-bhava) and jāti as links in the twelve link formula of dependant arising  to be understood?
It is actually pretty simple. Once you have identified "yourself" and equated it with an organism, you must have been born. Makes sense? If you don't think you are this organism, moreover, you don't think there is any "you" at all, the notion of birth no longer applies.