Chapter 4! With a new mishnah. On the case of a female animal that is slaughtered with a fetus in her womb, whether it is discovered after slaughtering or in the case that she is slaughtered during the birth. If the fetus is inside the mother at the time of the slaughtering of the mother, the fetus is considered slaughtered as well. Also, one view on a limb from the fetus that emerges from the mother's body is not kosher. And another challenges that. Plus, meat "outside the field" cannot be eaten, in contrast to the fetus that remains in the bounds of the mother.