Introduction
Single intrauterine death (sIUD) in twin pregnancy has become a
relatively frequent complication of twin pregnancy. The overall
incidence of sIUD is estimated to be up to 2.6-6.2% of all twin
pregnancies. 1-5 The surviving twin has many
complications, such as brain damage, preterm birth, and survivor
intrauterine death. 1, 6, 7Out of these complications,
preterm birth (PTB) is a problem that can not be ignored due to its
lasting adverse impact on the surviving twin. For instance, brain damage
and multiple organ immaturity caused by PTB aggravate the bad prognosis
in the surviving twin. 6 Because of peculiar chorionic
problem in twins and vascular communication in monochorionic (MC) twins,
some previous systematic reviews reported that the rate of PTB was
higher in MC twins than in dichorionic (DC) twin pregnancy.2, 7, 8 However, studies about PTB related to sIUD in
MC twins are limited. Therefore, the purpose of this study was to
analyze PTB-related factors for sIUD in MC twins.