Embryo sex selection involves choosing the sex of an embryo before implantation, typically through in vitro fertilization (IVF). It can be achieved using techniques like preimplantation genetic testing (PGT), where embryos are screened for sex chromosomes. This process helps ensure the desired sex of the child, often for medical or family balancing reasons. Sex selection is legal in some countries but highly regulated or prohibited in others. Ethical concerns arise regarding gender preference and potential societal impacts. The technology has raised debates on the implications for gender equality and cultural norms.