Multiple Gestation Flashcards
What are the causes of multiple gestation?
If >1 egg is released during one menstrual cycle
If the zygote divides after fertilisation
IVF treatment (often more than 1 embryo is transferred to the uterus)
What are the types of twin pregnancies?
Dichorionic diamniotic twins
Monochorionic diamniotic twins
Monochorionic Monoamniotic Twins
What is monochorionic Monoamniotic Twins?
One placenta
One amniotic sac
What is dichorionic diamniotic twins?
Two placentas
Two amniotic sacs
what is Monochorionic diamnioic twins?
One placenta
Two amniotic sacs
What are the membranes called which surround a baby?
Chorion - outer membrane
Amnion - inner membrane
What sign can be seen for dichorionic, diamniotic twins?
Lamba sign on ultrasound.
What sign can be seen for monochorionic, diamniotic twins?
T sign on ultrasound.
Which type of twins does ‘twin to twin transfusion syndrome’ affect?
Monochorionic twins (they must share the same placenta)
What is twin to twin transfusion syndrome?
When one twin receives more blood from the placenta than the other.
Smaller twin = donor twin.
bigger twin = recipient twin.
What are the complications of twin to twin transfusion syndrome?
Donor twin - malnourishment and organ failure
Recipient twin - overwork of the heart, other cardiac failures
When are dichorionic diamnitic twins delivered?
37 weeks
When are monochorionic diamniotic twins delivered?
36 weeks
When are triplets delivered?
35 weeks
ALWAYS offered C section.
