Threatened
preterm
labour
was
defined
as
contractions
occurring
at
the
frequency
of
at
least
1
time
in
10
minutes
with
no
effacement
and
dilatation
of
cervix
between
20-37
weeks.
The
examination
was
taken
at
least
30
minutes.
(3)
Preterm
labour
was
defined
as
regular
uterine
contractions
4
times
in
20
minutes
or
8
times
in
60
minutes
with
progressive
cervical
dilatation
greater
than
1
cm
and
effacement
at
least
80%.
(4)
Successful
to
stop
uterine
contractions
was
defined
as
no
contractions
after
inhibition
of
12
hours.
Non-successful
to
stop
uterine
contraction
was
defined
as
present
contractions
during
and
after
inhibition
12
hours.