 According to Charlotte Furth, "a pregnancy (in the seventeenth century) as a known bodily experience emerged [...] out of the liminality of menstrual irregularity, as uneasy digestion, and a sense of fullness".These symptoms were common among other illness as well, so the diagnosis of pregnancy often came later in the term.The "Canon of the Pulse" or the use of pulse in diagnosis stated that pregnancy was "a condition marked by symptoms of disorder in one whose pulse is normal" or "where the pulse and symptoms do not agree".