Bekhorot 22: Purifying Fish Brine

NOTE: This daf talks about animal miscarriage and extends the conversation to human miscarriage. Please be forewarned.

A new mishnah! With various status questions regarding the first-born. Even when the mother has conceived and had a miscarriage before carrying the animal that becomes her first-born to term. Also, if you buy fish brine from someone who is not reliable with issues of purity and impurity, then you have to purify the fish brine. Which is a different process of purification than that of a vessel, for example, because it's liquid to begin with.