MoMo, MoDi, DiDi – what does this all mean?

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Since the day we found out we were having twins, I did the worst thing you could ever do for your brain and your insecurities about pregnancy, Google!

Actually it wasn’t all bad news that we read. Most of the information we read from sites like:

were very informative and helped us understand the situation we were in.

From the picture of our babiestwins ultrasound, we learned from the doctor there was a risk involved with our pregnancy. If the twins shared the same sac and placenta or in medical lingo Mono amniotic-Mono chorionic, they would be referred to as MoMo twins. If they shared the same placenta and had two sacs, they would be mono chorionic di amniotic, hence MoDi.

Amniotic – Sac
Chorionic – Placenta

Many sites and blogs I came across showed many beautiful delivered MoMo twins and from what I read, there is one unique fact about MoMo twins, they’re always or 99.999% identical babies. Not so much like Brandon and Brenda from my favorite TV show in the 90’s, but more like the Winklevoss twins from the movie “the Social Network.”

Sadly, there are increased risk with this type of pregnancy, but I won’t go into the details here. If you really want to read more, feel free to visit the above links.

Identical twins don’t only happen in a MoMo pregnancy, but also in a MoDi one. MoDi or Monochorionic-Diamniotic, means two sacs but one placenta.

These twins are identical as well because of the way the egg splits after fertilization, but just form a separate sac for each baby. Compared to MoMo, MoDi has less risk because of lower chances of umbilical cords getting tangled.

Brandon and Brenda type twins are referred to as DiDi twins or Diamniotic-Dichorionic. Meaning the babies have separate sacs and separate placentas. This pregnancy can produce a boy/girl, boy/boy and girl/girl combination. Probably with the least amount of risk of the twin pregnancies, DiDi twins have less complications.

Here’s a nice little picture from wiki that explains a lot.

Our doctor didn’t want to confirm what we had yet till later ultrasounds. So all we could do was continue our positive thinking and hope for the best. So with learning this news, we decided to purchase a book to get some guidance on what we needed to do to give these kids the best possible chance out there. We purchased When You’re Expecting Twins, Triplets, or Quads: Proven Guidelines for a Healthy Multiple Pregnancy by Barbara Luke from Amazon.

On a side note: Regardless of what you read and what you hear from others, please keep positive. I always remember the “life is like a box of chocolate” quote from the movie Forrest Gump, but I always like to add that if all you can think about is crap being in that box, you’ll never be able to enjoy the chocolate when you see it. This is an awesome moment in your life. Enjoy it. And if you’re in the same shoes as we are, it’s still too early to say anything is for sure.

So now with enough medical knowledge, it was time to tell our families.