Definition
Post-procedural complication included the things happened within two
weeks following the procedure: intrauterine fetal death( IUFD) of the
co-twin, miscarriage, pregnancies were terminated due to abnormal
ultrasound findings such as hydrops of the co-twin.
Adverse perinatal outcome included any of the following: IUFD or
miscarriage after two weeks following the procedure, termination of the
pregnancy and preterm delivery before 28 weeks of gestation.
sIUGR was defined as an estimated fetal weight < 10th
percentile in one twin and estimated fetal weight discordance ≧25%.
Cases were classified into one of three types according to UA Doppler
flow10.