An expression meaning 'since one was born' or 'all one's life (up to now)', indicating something that has been true from birth onward.
私は生まれてからずっとこの町で暮らしている。
I have lived in this town since I was born.
生まれてから一度も海外へ行ったことがない。
I've never been abroad since I was born.
あの習慣は生まれてからの環境の影響が大きい。
That habit is greatly influenced by the environment one grew up in.