Does it cost more to transfer 2 embryo’s than just 1

I really really want a double embryo transfer. It’ll be my first IVF and i’m not even sure what my RE will say about this but I plan to advocate for a DET. I would love twins and I am 100% aware of the risks. Of course if only one stuck I’d be just as delighted but I’d still like to try for twins. Anyway, I was jw if any of you ladies have experience with transferring 2 embryo’s over 1 and did it cost the same? Is there anything super different about transferring 2 vs 1 other than the obvious high risk of multiples? Any input helps! ☺️