Preterm
labour
is
still
the
main
etiology
which
causes
high
perinatal
morbidity
and
mortality.
The
prevalence
of
preterm
labour
in
Siriraj
Hospital
is
about
8.4%.
(1)
Siriraj
Hospital
is
the
tertiary
center
where
complicated
preterm
pregnant
women
have
been
referred.
The
limitation
of
neonatologists
and
newborn
intensive
care
unit
(NICU)
resulted
in
insufficiency
care
of
preterm
birth.
Therefore,
many
trials
were
initiated
to
inhibit
or
prevent
preterm
birth