A syringe has a syringe body configured to receive a product for injection. Gripping wings are arranged at one end of the syringe body. A piston rod is mounted so as to be able to slide inside the syringe body. A stop is arranged at a first end of the piston rod and has an end-of-travel position inside the syringe body. A pusher is arranged at a second end of the piston rod. The pusher has a mass greater than or equal to a threshold value beyond which the syringe has a center of gravity situated outside the syringe body when the stop is in the end-of-travel position.
