eSBT= Elective single blastocyst-stage transfers; DBT= Double blastocyst-stage embryo transfers; Each of twin births was counted as one newborn
a Five monozygotic twin births after eSBT
One baby with patent foramen ovale after eSBT; Two babies in DBT group were diagnosed with ventricular septal defect. One boy of twins in DBT group was diagnosed with congenital hypospadias.
Bold indicates P - value <0.05.
Table S1.
Pregnancy outcomes in eSBT and DBT groups following initial fresh transfer cycle.