The different types of Twins

Hey everyone! Alright lets start of with Twins. Many people don't know that there are different types of twins you can have until you are pregnant. Plus it can be very irritating for twin mothers to be asked several questions and wish that everyone was educated on twins. So I will gladly tell you the differences and hopefully help everyone out. 

• Mo/Mo Twins - Monochorionic/Monochorionic Twins. This means that there is one amniotic sac and one placenta. This is a VERY dangerous pregnancy because the twins are sharing everything. They can easily become tangled and have a higher risk of TTTS.
• Mo/Di Twins - Monochorionic/Diamniotic Twins. This is when there is two amniotic sacs but only one placenta. This is less dangerous because the twins do not have the risk of becoming entangled but still have the risk of TTTS because they are sharing the source of all nutrition, the placenta.
• Di/Di Twins - Diamniotic/Diamniotic. This means that there are two sacs and two placentas. This is the low risk pregnancy compared to the other two. They are sharing absolutely nothing as far as nutrition and have there own area to grow. 

Now when a woman has Identical Twins that means that she either had a Mono/Mono or Mono/Di pregnancy. This means that she only released one egg and that one egg was fertilized and then split. If a woman had Fraternal Twins this means that she had two eggs released and each egg was fertilized separately. This means that Identical twins can only be boys or girls; Fraternal twins can be boys, girls or one of each. 

I hope this helps clear up some confusion on twins.

Thanks for reading!