› added 7 years ago
573
TIL that up until the 1960′s, the only reliable pregnancy test was to inject a woman’s urine into a female African clawed frog. If the woman was pregnant, the frog would ovulate within 12 hours.
› added 7 years ago
573
TIL that up until the 1960′s, the only reliable pregnancy test was to inject a woman’s urine into a female African clawed frog. If the woman was pregnant, the frog would ovulate within 12 hours.