There is one who is [counted as] a firstborn [with respect to] inheritance but not with respect to redemption from a priest; a firstborn with respect to redemption from a priest but not a firstborn [with respect] to inheritance; a firstborn [with respect to both] inheritance and redemption from a priest; and a firstborn [in respect] to neither inheritance nor redemption from a priest. Which is a firstborn [with respect] to inheritance but not to redemption from a priest? One which follows one which was not viable whose head came forth alive, or one born in the ninth month whose head came out dead, or when a woman aborts something that looks like an animal, beast or bird, the words of Rabbi Meir. But the sages say: [it is not considered an opening of the womb] until [the abortion] has the form of a human being. If [a woman] aborts a sandal or a placenta or a fetus having an articulated shape, or if an embryo came out by pieces, [the infant] which follows after them is a first-born [with respect] to inheritance but not a first-born for redemption from a priest. If one who never had children married a woman who had already given birth, even if she had given birth when she was a slave but is now free, or [had given birth] when she was a non-Jew but has since converted, if after coming to the Israelite she gave birth, [the infant] is considered a first-born [with respect] to inheritance but not a first-born for redemption from a priest. Rabbi Yose the Galilean says: [the infant] is a firstborn [with respect] to inheritance and for redemption from a priest, as it says: “Whatever opens the womb in Israel” (Exodus 13:2), meaning only if it opens the womb in Israel. If one had children already and married a woman who had never given birth previously Or if she converted when pregnant, or if she was freed when pregnant, and she gave birth; If she and a priestess gave birth, she and a Levite’s daughter, she and a woman who had already given birth; And similarly [if a woman] who did not wait three months after her husband's death, married and gave birth and it is not known if the infant was born in the ninth month since the death of the first [husband] or in the seventh month since she married the second, it is a firstborn for redemption from a priest but not a first-born [with respect] to inheritance. Which is a firstborn both [in respect] of inheritance and for redemption from a priest? If [a woman] miscarries a sac full of blood or full of water or full of pieces of flesh; or if [a woman] miscarries something with the shape of fish or locusts or reptiles, or creeping things, or if she discharges on the fortieth day [of conception], [the infant] which follows after [these discharges] is a firstborn both [in respect] of inheritance and for redemption from a priest.