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My bloody thread!!
He has the attention span of one, does that count?
Miss T found a frog in the loo............
In the 1930s, it was discovered that a female Xenopus (Xenopus laevis, the African Clawed Frog) would ovulate if injected with the urine from a pregnant woman - the hormone chorionic gonadotropin being the active ingredient. For a while in the 1940s and 50s, this was the only available pregnancy test, and many hospitals kept Xenopus.