The urine of a patient was injected into a frog. If the woman was pregnant, the HCG hormone was thought to trigger amphibian ovulation and the frog spawned in 24 hours.
Read the full article on: Top 10 Historical Methods of Detecting Pregnancy ( 80).
By Iván Ferrer Durbà B.Sc. (biologist & science teacher) and Sandra Fernández B.A., M.A. (fertility counselor).
Last Update: 06/30/2015