or umbilical cord occlusion [27]. The prognosis of
MC twins with selective IUGR is highly influenced
by the umbilical artery Doppler of the small twin. If
the small twin suffers from absence or reversal of
end-diastolic velocity of the umbilical artery, it
would display a relatively high perinatal mortality
rate. Quintero et al [27] conducted a pioneer
study using laser therapy to convert the MC placenta
to a functionally DC one. They claimed that
the neurologic deficit in the IUGR twin would
decrease but the mortality rate of the small twin
would remain the same. The technique to laser the
communicating vessels in MC twins with selective
IUGR is more difficult than in TTTS usually because
of the lack of polyhydramios. In unfamiliar hands,
it could make the condition worse.