Maternal Age (year) 30 (15–42)
Gestational age at surgery (weeks) 21 (16–25)
Location of placenta  
Anterior 87 (51%)
Posterior 84 (49%)
Quintero stage  
Stage I 19 (11%)
Stage II 36 (21%)
Stage III 92 (54%)
atypical 31
classical 61
Stage IV 24(14%)
Complete surgery 170 (99%)
Anesthesia  
General 36 (21%)
Epidural 135 (79%)
Operation time (minutes) 58 (24–158)
Data are shown as median (range) or number (%)
Table 1: Baseline and surgical characteristics (n=171).