Low birth weight is defined
by WHO as a birth
weight
less
than
2500
g
(before
1976,
the
WHO
definition
was
less
than
or
equal
to
2500
g),
since
below
this
value
birth-weight-specific
infant
mor-
tality
begins
to
rise
rapidly
(2-5).
However,
plots
of
the
cumulative
frequency
distribution
of
birth
weight
show
two
different
normal
distributions
and
2000
g
has
been
suggested
as
a
lower
cut-off
point
(6)