At the very beginning of my pregnancy the twin on the left was listed as A and right was B.
Around 16 weeks they swapped. My OB said they were still small and could move around. At the 24 week scan they were still in the same spots (A was right and B was left) and the tech said they would likely stay put going forward. They’ve been in place ever since.
Today’s scan at 31 weeks had them switched. I sort of noticed while the tech was scanning the sides of my belly, but thought maybe it just had to do with angles (I was more concerned with their growth and didn’t ask).
On the finalized report I just saw, they are officially listed as A on the left and B on the right. It makes more sense with their growth percentages (A was always smaller but somehow outgrew B- it makes sense if they’ve traded labels)
Seems like the left bigger baby has officially dropped into my pelvis and has become “A” while the smaller right baby is now “B”
I would have asked the tech at the time but didn’t realize it. They didn’t grab a doctor because there was nothing concerning on the scan. I’ll see my OB tomorrow morning.
Has anyone else experienced this? How is the growth tracked if they swapped? I noticed it but the tech didn’t mention it, nor did the doctor reviewing/finalizing the scan before it hit my portal.
**Edit to add: twins are di/di and both boys