Sex determination in chickens at an early embryonic stage has been a longstanding challenge in poultry production due to the unique ZZ:ZW sex chromosome system and various influencing factors. This review has summarized the genes related to the sex differentiation of chicken early embryos (mainly Dmrt1. Sox9. Amh. https://lecoureures.shop/product-category/mountaineering-accessoires-sacs-a-dos/