Multiple Pregnancy Flashcards
1
Q
Monozygous twins
A
Due to a split in a single fertilised ovum. Always same sex, same genetic make up.
2
Q
What happens in monozygous twins when splitting happens in morula stage?
A
DCDA
3
Q
In monozygous twins, if splitting occurs in blastular stage
A
Monochorionic and diamniotic
4
Q
In a monozygous twins, a split later than the blastular stage will result in
A
Monochorionic monoamniotic
5
Q
What happens if a split occurs after formation of embryonic disc?
A
Siamese(conjoint twins)
6
Q
What are dizygous twins?
A
Result of fertilisation of 2 separate ova and accounts for 80% of twins
May be different sex, but dichorionic and diamniotic
