Prior to my first ultrasound with the girls, I had never heard of identical triplets. That doctor's appointment was quite shocking all around but trying to understand the dynamics of identical triplets was interesting to say the least. I should note that I had always had an odd fascination with identical twins so it's quite ironic that I ended up with identical triplets.
Identical triplets are formed when an egg splits (creating identical twins) and then one of those "twins" splits again. Rich and I have always been curious as to which of the girls was created from that second split. I believe that Anna was from the second split. Partly because my doctor told us that with egg splitting, birth defects are quite common. Although, of all the other identical triplets I've come across on the internet, there are no birth defects. That's what Anna's condition was labeled as. "Birth defect. " I remember breathing a sigh of relief when the doctor who analyzed the ultrasound told us that she had a birth defect. I thought, "Birth defect? It's not life threatening? I can handle a birth defect."
So we've concluded that Anna and Emily (Babies B and C) are from the second split. They weighed exactly the same at birth. Allie (Baby A) weighed slightly more. Maybe someday in the future, scientists will have created a DNA test that can determine how identical triplets were formed - which baby resulted from what split. It's interesting because lately I've noticed Anna using her left hand a lot more. Sets of mirror image twins have a lefty and a righty.
And I have to add that of the billion comments I've received, only one stranger actually understood how identical triplets happen. She said, "You sure have weak eggs, girl!"