The article from Postimees details a fascinating historical method of pregnancy testing that utilized frogs, particularly the African clawed frog, before the availability of modern tests in the 1970s. This technique, known as the Hogben test, involved injecting a woman's urine into the muscles of a female frog, which would then ovulate and lay eggs if the woman was pregnant. This method was not only a more humane alternative to previous animal testing but also surprisingly effective, providing results within 12 to 24 hours.

The article highlights the significance of this testing method, emphasizing how it marked a shift in scientific practices. Instead of resorting to more severe and inhumane experiments on animals, using frogs represented a more ethical approach while still achieving reliable results. The process exploited the similarities between human pregnancy hormones and those in frogs, showcasing an interesting intersection between human biology and animal physiology that allowed for accurate testing decades ago.

In conclusion, this historical perspective not only sheds light on the evolution of medical testing but also reminds us of the often-overlooked connections between human and animal biology. Today, as we reflect on these methods, it raises important discussions about ethics in science and the continuing need for humane practices in research.