Morning Everyone

I just wanted to clarify some stats. I was told when having a Day 5 Blast transferred there is a 35-40% chance of conceiving. And when having a Day 6 Blast transferred there is only 30-35% chance of conceiving. They say Day 6 transfers are less likely not to implant. When trying to conceive they say its a 20% chance.
Is this right?
Does ICSI also give you a more chance of conceiving?
Sorry for the thousand and one questions I am still learning something new everyday on IVF/ICSI