2,599. A Pregnant Animal

Hilchos Shechita 12:9

If the hybrid offspring of the aforementioned deer was female and it gave birth, one would be liable to lashes for slaughtering that hybrid and its young on the same day. Similarly, one is liable to lashes for violating “it and its offspring” with the hybrid offspring of a sheep and a goat regardless of which parent is male and which is female.

Hilchos Shechita 12:10

One is permitted to slaughter a pregnant animal because the fetus is considered one of the mother animal’s limbs. If, after the mother’s slaughter, the fetus came out alive and stepped on the ground, one may not slaughter it that same day. If one did so, he isn’t liable to the penalty of lashes.