From their research the "Aschheim-Zondek test" for pregnancy was created, which involved injection of a patient's urine into an immature laboratory mouse. If the rodent displayed an estrous reaction, it represented a positive indication of pregnancy.
The discovery by Aschheim and Zondek of the "Aschheim-Zondek test" for pregnancy involved injecting a patient's urine into an immature laboratory mouse, which would exhibit an estrous reaction if pregnant. This method provided a positive indication of pregnancy.