CCC 2270 Human life must be respected and protected absolutely from the moment of conception. From the first moment of his existence, a human being must be recognized as having the rights of a person – among which is the inviolable right of every innocent being to life.1
Before I formed you in the womb I knew you, and before you were born I consecrated you.2
My frame was not hidden from you, when I was being made in secret, intricately wrought in the depths of the earth.3

1 Cf. CDF, Donum vitae I, 1.
2 Jer 1:5; cf. Job 10:8-12; Ps 22:10-11.
3 Ps 139:15.