I'm inclined to agree with J. This really isn't "news". This family just wanted attention. IVF is costly so the eggs are harvested initially and then frozen until used. Frozen outside the body until used instead of being kept in the body until used.

By this standard, we are all mulitples to our siblings because we are all from eggs that came from our mother's womb.

This child will probably be picked on if he ever tries to convince anyone that his sister is his twin. Shame on his parents for putting this wild idea in his head and setting him up for a childhood of being laughed at.