Various theories abounded, such as the possibility that pregnancy urine contained certain identifiable crystals or bacteria. Scientists did not know enough about pregnancy to develop a reliable test.
Making Contact on MSN
Buried history: The woman who created the home pregnancy test (encore)
This story was originally produced in 2014, and first aired on Making Contact in February 2024. In 1965 Margaret Crane was a ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results