What do you think?
Rate this book


232 pages, Hardcover
Published August 30, 2021
A blue tongue color during pregnancy may indicate the imminent danger of miscarriage. This was noted as far back as the 7th century by Chao Yuan-Fang in Discussion of the Origin and Symptoms of Disease. Chao observed that a blue tongue color and red face in a pregnant woman indicate the imminent death of the fetus and survival of the mother, while a red tongue color and a blue face indicate the death of the mother and survival of the baby.