“…Human beings have either XX or XY sex chromosomes in every cell, which determine whether they produce sperm or ova, and ultimately whether they are male or female (McCarthy, Nugent, & Lenz, 2017). The binary nature of sex cells is a fundamental aspect of human biology (Budin, 2020;Parker, 2021) and embryos are assigned a 'sex', not a 'gender', based on their biological characteristics (Broughton et al, 2017).…”