Can Monochorionic Diamniotic Twins Be Different Genders?

Learn why monochorionic diamniotic twins must be the same sex and explore the unique characteristics of this type of twin pregnancy.

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No, monochorionic diamniotic twins cannot be a boy and a girl. This type of twin pregnancy means they share a single placenta but have separate amniotic sacs. Since they originate from the same fertilized egg, they are always identical, meaning they must have the same sex.

FAQs & Answers

  1. What does monochorionic diamniotic mean? Monochorionic diamniotic refers to twins that share a single placenta but have separate amniotic sacs, indicating they are identical.
  2. Can monochorionic twins have different blood types? No, since monochorionic twins are genetically identical, they will have the same blood type.
  3. How are monochorionic twins different from dichorionic twins? Monochorionic twins share a placenta, while dichorionic twins each have their own placenta, and they can be either identical or fraternal.
  4. What are the risks associated with monochorionic twin pregnancies? Risks include Twin-to-Twin Transfusion Syndrome (TTTS) and other complications due to shared vasculature.