THE ABNORMALITIES OF THE PRESENTATION IN TWIN PREGNANCY AND PERINATAL-MORTALITY

The author conducted a retrospective review of the obstetric patient m aterial in his department between January 1, 1975 and December 31, 199 2, concerning the clinical implications associated with various lies a nd presentations of twins. The material included 329 twins (1.07% of a ll births). Breech, or transverse lies complicated 186 (56.53%) twin g estations. The frequency of premature newborns was among 186 malpresen ted twin pairs 85 (45.7%) and 101 (54.3%) were mature. The percentage of malpresented twin fetuses increased with maternal age and parity. A bnormal presentations were more frequent (78.49%) among B than A fetus es (54.84%). Perinatal mortality was more frequent among B than A fetu ses and more frequent between malpresented twin pairs than the vertex- vertex presented twins.