is tetra-x (xxxx) hereditary?

Question

Yes it exists. My sister had a miscarraige and it was sent to Children's hospital for the dna to be broken down. The results came back that the baby had Tetra-x or xxxx (double the chromosone). This makes her 3rd miscarraige she had 1 miscarraige, a sucessful pregnancy resulting in a beautiful baby girl and now 2 more miscarraiges.
She was wondering if this is hereditary.

Answer 1

I don't think it exists, do you have more details on this? good luck