on themselves so that the wire has two globally parallel strands 28 29 spaced apart by a distance of a few tens of millimeters for example the sides 18 19 are slightly bent inward and imitate as far as possible the front hooves of a boar and therefore its embrace which makes it possible to verify if the female is receptive to insemination stimulates the female and causes discharge of ocytocin which results in uterine contractions this kind of clip 17 envelops the belly of the female securely without it being necessary to strap it on and ensures that the device is stable obviously the rigid saddle 12 can be washed and sterilized the sachet 20 is a flexible sachet of transparent plastics material formed of two films constituting the walls of the sachet and welded together its transparency enables visual control of artificial insemination the weld defines a peripheral edge at one end at least of the peripheral edge there are two lateral holes 21 22 forming eyelets on respective opposite sides of the sachet the sachet 20 is of the type described in u s pat no 5 971 971 for example the distance between the hooks 15 16 on the arm 14 is substantially equal to the distance between the centers of the holes 21 22 so that the sachet 20 can be suspended from the arm 14 by these holes as can be seen in the figures in this position the sachet 20 is globally vertical the hooks 15 16 are oriented toward the rear in this embodiment relative to the animal they could instead extend toward the front means for applying a constant pressure associated with the sachet 20 include.