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
?