בבא קמא ה׳:א׳ - ה׳:ב׳

שור שנגח את הפרה – who was pregnant.

ונמצא עוברת בצדה – that died.

ואין ידוע אם עד שלא נגח ילדה – and did not die because of the goring.

אם משנגחה – and because of the goring aborted the fetus.

ורביע נזק – for an innocuous ox is liable for half damages and this offspring lies in doubt and we divide it. And our Mishnah is according to Sumachos who stated that money that is lies in doubt, we divide the money. But the Sages state that this is a great principle in law (see, for example, Tractate Bava Kamma, Chapter 3, Mishnah 11 above): “He who seeks reparation from his fellow must produce evidence (i.e., upon him is the burden of proof).” But the Halakha is according to the Sages. And even if the [owner of the] animal who suffered damages asserts a certainty (i.e., literally, “sure”) and the [owner of the] animal who caused the damages says “perhaps” (i.e., a possibility), “he who seeks reparation form his fellow must produce evidence.”

וכן פרה שנגחה את השור וכו'- if the cow is found, it is according to the innocuous [animal whose owner] pays one-half damages from his estate, but if the cow is not found, he pays one-firth damages from the offspring, for if he had known that prior to [the cow] giving birth it had gored, he would pay all of the half-damages from the offspring, for she was pregnant and had gored and her fetus was gored, but if it was after she gave birth that she gored, he would not pay from the offspring anything, for the offspring did not gore. But the [owner of the] innocuous animal pays other than from his estate. But now that there is a doubt, they divide it and from the one-half damages that he has to pay, he pays one quarter damages from the offspring.

ואם הוזקה בהם בעל הפירות חייב – and these words refer to when the animal slips and stumbles/falls through them. But if she (i.e., the animal) ate from them until she died , the owner of the produce is exempt [from indemnity] because she should not have eaten them.