Be sure to read Part 1 of this series here!

By the early twentieth-century, doctors knew that some women, at that time it seemed to be mostly white women, had sugar appear in their urine toward the end of their pregnancies.  They also knew that this condition went away when the mother gave birth.  In 1954, a doctor in Boston began a ten year study to see if this condition was an early warning sign for these women developing diabetes later in their lives.  Dr. John O'Sullivan reported in...