"First breath" refers to the Abrahamic origin story, that of Adam. The control freaks can point to multiple passages that refer to life commencing at conception and claiming that personhood starts at that point.
It's all irrelevant, however. The bible is just an anthology of tribal stories, nothing more; stories developed by and for the benefit of the patriarchal society in which the tellers existed.
We don't use Grimm's Tales to dictate our life rules.
qurlyjoe