Sixty dairy cattle patients have undergone the tuboinsufflation test by the help of the apparatus devised by the present authors. The results obtained and the technique of the test were outlined in this paper. Some considerations were offered concerning this subject. For the purpose of diagnosing tubal patency, the insufflation test as described, though not yet perfect, seems to be helpful for the practician. Repeated insufflation is effective to some extent for the therapy of certain types of tubal infertility