[72a] But lo, [consider by way of contradiction to this the case of] a foetus and midwife that resembles [in its legal implications] the case of two rings. [The woman whose foetus died in her womb, and [that foetus] the midwife put in her hand and touched — the midwife is unclean with a seven-day uncleanness, and the woman is clean until the foetus will emerge [M. 4:3 F-G].] And yet the foetus does render unclean the midwife!
W. Rabbah [would have] said, “The case of the foetus is different since it is destined to come forth.” [The rule concerning contained uncleanness does not apply to it.]
X. Said Raba, “[You say that] the foetus is destined to come forth. Is not the ring also destined to come forth [from the animal through the natural process of elimination]?”