More Information:
How a Frog Became the First Mainstream Pregnancy Test [ Ссылка ]
Doctors Used to Use Live African Frogs As Pregnancy Tests [ Ссылка ]
Frogs used to tell women if they were pregnant with nearly 100% reliability [ Ссылка ]
How This Adorable Frog Became One of the Earliest Pregnancy Tests Around [ Ссылка ]
