
The Disappearing Spoon: a science history podcast with Sam Kean
The Birds and the Bees and the Frogs
Apr 15, 2025
18:33
A young woman in the mid-1900s couldn’t take an at-home pregnancy test. Instead, she sent a vial of urine to a clinic, where a technician would, of all things, inject it into a frog, and hormones in the urine would cause the frog to lay eggs. This frog-based test was far faster, easier, and cleaner than any pregnancy test before, and it shifted power for family planning from doctors to women themselves.
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