Reference for Niddah 42:4

לישנא אחרינא אמרי לה אמר רב יהודה אמר שמואל

R. Joshua ruled: She must bring a sacrifice and it may be eaten, since it is impossible for the uterus to open without some bleeding.<span class="x" onmousemove="('comment',' So that a sacrifice is due in either case: If she gave birth to an embryo she has to bring the sacrifice prescribed for one in childbirth, and if she merely aborted a lump of flesh, since this was inevitably accompanied by bleeding, she (cf. supra n. 4) is regarded as a zabah and is liable to bring the one prescribed for zibah. ');">⁴</span>

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