Apr 13, 2023 · The only types of twins you might be familiar with are identical and fraternal, but many twin types exist. Learn about mono/di twins, diagnosis, risks, and more.

Monochorionic, diamniotic (MCDA) twins are the product of a single fertilized ovum (egg), resulting in genetically identical offspring. MCDA twins share a single placenta (blood supply) …

Aug 11, 2023 · Mono di twins are identical twins who share the same placenta but have separate amniotic sacs. Learn the causes and risks of a mono di twin pregnancy.

Everything you need to know about mono di twins, and what it means for you and your babies.

Feb 11, 2025 · What is a mono-di twin pregnancy? A mono-di (or mo-di) twin pregnancy is one where twins share a placenta and each have their own amniotic sac. Mono-di is short for monochorionic diamniotic, meaning one chorion, two amnions. (The chorion is the outer membrane surrounding the embryo, and it develops into the placenta.

What are mo/di twins? Monochorionic diamniotic (mo/di) twins are identical twins that each have their own amniotic sac but share the same chorionic sac and the same placenta. The way in which the egg splits and the timing thereof determines whether …

Monochorionic twins are monozygotic (identical) twins that share the same placenta. If the placenta is shared by more than two twins (see multiple birth), these are monochorionic multiples.

Apr 12, 2020 · Monochorionic diamniotic twins occur in about 1 in 300 pregnancies. Compared with dichorionic twins, they face increased risks because of the shared circulation. In about 15%, an imbalance in blood exchange occurs, such as twin-twin transfusion syndrome and twin anemia polycythemia sequence.

Twin-to-twin transfusion syndrome (TTTS) occurs in 10–15% of monochorionic twins due to abnormal placental blood vessel connections. TTTS is caused by one twin (donor) sending excess blood to the other twin (recipient).

Pregnant with monochorionic diamniotic twins and wondering what that means for your twin pregnancy? Here's what to know.