"Jewish law also not merely permits, but demands, that the Sabbath be violated in order to save a fetal life. As lifesaving activity is the only situation in which a Sabbath violation is permitted; were a fetus not deemed alive by the Torah, this behavior would be entirely prohibited."
”The Torah identifies human life as a soul placed (breathed) within a body by G-d Himself. Rebecca is told not only that she is carrying twins, but that they have distinct natures and characters that explain their behaviors in utero. Jeremiah is told explicitly that "Before I placed you in the womb I knew you, before you left the uterus I sanctified you, I appointed you a prophet to the nations" [Jer. 1:5; emphasis, of course, added].”