poem in praise of menstruation

if there is a river more beautiful than this bright as the blood red edge of the moon          if there is a river more faithful than this returning each month to the same delta          if there is a river braver than this coming and coming in a surge of passion, of pain          if there is a river more ancient than this daughter of eve mother of cain and of abel          if there is in the universe such a river          if there is some where water more powerful than this wild water pray that it flows also through animals beautiful and faithful and ancient and female and brave