作为人体内的条件必需氨基酸，精氨酸可通过多种途径促进机体早期的生长和发育。该文总结了精氨酸在胎盘、胚胎和出生后子代的发育进程中所发挥的重要作用及其机制，阐述了当前备受关注的有关精氨酸添加的安全问题，并对未来精氨酸的研究方向作出展望。

Arginine, as a conditional essential amino acid, promotes early growth and development of human body through a variety of ways. This paper summarizes important roles of arginine in the development process of the placenta, embryo and postnatal offspring and associated mechanisms, describes concerned safety issue of adding arginine, and presents future directions for arginine research.