The Authors have verified the utility of the Laser CO2 instrument for termino-terminal anastomosis of the uterine horns of the rat. In this study Laser tecnique is compared with the same traditional microsurgical operation. No significant difference was seen in the number of pregnancies nor fetuses born. On the contrary, hystological observation has shown lower reactivity in the group treated with Laser technique 10 days. In this group it was also noted that there was less formation of postoperative adhesions, and, during the operation, there was easier dissection of the tissues accompanied by lower blood loss and necrotic debris.