what is zygosity ?
x - number of eggs
chorionicity?
number of placenta
amnioticity?
number of amniotic sacs
monozygotic twins. number of placenta and amniotic sacs?
1 and 1
mono chorionic and mono amniotic
when and how twins diagnosed?
booking US
High AFP
complications of twins?
pre eclampsia, pre term labour, growth restriction, APH, twin transfusion