The rabbit test, or Friedman test, was an early pregnancy test which required killing and dissecting a rabbit to obtain the results. The test was developed in 1931 by Maurice Friedman and Maxwell Edward Lapham[1] at the University of Pennsylvania.
^"The assay of gonadotropic extracts in the post-partum rabbit". Journal of Endocrinology. 24 (5). 1 May 1939.