When and how was pregnancy test invented?

Back to 1350 BC, we find the earliest ancient records showing evidence for the urine-based method of testing for pregnancy. The old Egyptian papyrus document shows that women would urinate on wheat and barley seeds and that if there is growth, then the woman was pregnant, but if the seeds did not grow, then she was not considered pregnant.

Then in the 1950s and 1960s, a "hemagglutination inhibition test" was determined by L. Wide and C. A. Gemzell. These were the years that the urine test was solidified. The test put to use purified hCG. When the pregnancy test is positive, the red cells clumped in a specific pattern.

A pregnancy test kit is one of the modern inventions that women, in particular, get benefit from today. Pregnancy tests measure the human chorionic gonadotropin (hCG) which was only discovered in 1930. Harry Zwarenstein and Hillel Shapiro were the first researchers who discovered that the injection of a pregnant woman’s urine into a South African Xenopus toad made the toad ovulated.

This improved opening to different experiments but it was Organon International in 1969 who first patented the first home pregnancy test kit that was designed by Margaret Crane. The first PT kits were distributed in Canada in 1971 and in 1977 to the United States. This helped millions of women to gain result fast and take the pregnancy test at home.