“Looking back at the history of pregnancy testing reveals a remarkable evolution. As early as 1350 B.C. Egyptian women were told to urinate for several days on wheat and barley seeds. Subsequent growth of the seeds would indicate that the woman was indeed pregnant. Modern studies have confirmed that the hormones present in the urine of pregnant women does in fact promote germination 70% of the time, while the urine of non-pregnant men and women does not.”
There we go. I needed to know how the princess would “know” she was pregnant, since she’d had trouble with her menses. Now I know.