IVF, FET & Gender survival rates?

I read somewhere that Girl embryos are more resilient that Male embryos. They survive acidic environments better and possibly the thawing better?

And also, there is a Gender skew dependent on what day you do the transfer (3-day vs 5-day) AND if u do ICSI technique?

Does anyone know more about this?? We will do a FET (3 day) and Im curious if its more likely a Girl because they are more resilient and because we did ICSI?