I’ve looked up Vanishing Twin Syndrome, and almost every article I have seen said that VTS typically only happens during the first trimester of the pregnancy.
But here’s the catch: My mom didn’t realize or know she was pregnant with me until 7 months into the pregnancy. And when she found out, the ultrasounds did show two babies. Me and my twin.
If Vanishing Twin Syndrome usually only occurs during the 1st trimester, is there a reason why it can happen so late during the pregnancy, as in the case with my mom and my twin? Or is there technically another name for this specific situation?


The twin may be inside you. I know someone who also had a twin in the womb and she had a “mass” removed and the mass had hair and nails.
What you’re describing is a teratoma; vestigial twinning and chimerism don’t generally present that way.
South Park?
… as someone who’s had many XRays and cat scans done in my life, I feel like a mass would have shown up long before now