When you have IVF the FS/RE and team place the embryo very specifically and the theory is that (female) orgasm will move the embie out of place.

If you think about natural conception female orgasm is often encouraged to assist with the movement of egg/embryo to correct placement in the uterus. So this in IVF or an FET would be having the opposite effect.

Either way I hope your having fun and more importantly good luck with this cycle.