The function of the reproductive system is mainly to reproduce, while the testes and ovaries also have certain endocrine functions. 1. Reproduction: In the process of reproduction, the male provides the sperm and the female provides the egg. During sexual intercourse, the penis injects the sperm into the vagina and the sperm swims into the uterus, where it fertilizes the egg in the juxtaposition of the fallopian tubes and the fertilized egg develops into an embryo that implants into the endometrium for further development until the delivery of a full-term fetus. 2. Endocrine function: male testes mainly produce androgens, which can maintain male sexual characteristics, promote protein synthesis, enhance male muscle strength, and also participate in the metabolism of blood glucose and blood lipids. Female ovaries mainly produce estrogen, progesterone and a small amount of androgen, which can maintain female sexual characteristics, promote the development and maturation of the reproductive system, as well as sodium and water retention, lower cholesterol. If you would like to learn more about the reproductive system, please consult a medical professional.