I reacted to:
> FWIW the rabbit always died whether you were pregnant or not :(.
It's not that an injection of urine if a pregnant woman kills the rabbit.
It's like the rabies test on the brain. We cannot look at the brain before you're dead, because the act of looking at it would kill you.
> The original test involved injecting urine into a rabbit, killing it after a few days,
I can see how this might be read in two different ways now.
He says in his comment that they inject the urine, then, a few days later, they kill the rabbit.
Those weren't his words, and his actual words (which he quoted above, acknowledging their ambiguity) could be (mis)read as meaning that injecting the urine killed the rabbit a few days later, especially since he also wrote "apparently [frogs] could survive the urine injection".
I do still find it odd that injecting urine into the frog repeatedly is OK for the frog, but perhaps the volume was quite small.