In 32 cases of insanity of pregnancy recorded by _Ripping_, 8 cases occurred in the first pregnancy, 5 in the second, 6 in the third, 3 in the fourth, 4 in the fifth, 1 in the sixth, 1 in the seventh, 3 in the eighth, 1 in the tenth. Of these women 3 became affected in the 1st month[41] of pregnancy. 4 became affected in the 2d month of pregnancy. 1 became affected in the 3d month of pregnancy. 2 became affected in the 4th month of pregnancy. 1 became affected in the 5th month of pregnancy. 0 became affected in the 6th month of pregnancy. 5 became affected in the 7th month of pregnancy. 5 became affected in the 8th month of pregnancy. 5 became affected in the 9th month of pregnancy. 6 became affected in the 10th month of pregnancy. The neuralgias of pregnancy affect the most diverse nerve tracts, and may occur either spontaneously, without any discernible local exciting cause, or in consequence of the pressure exercised by the enlarging uterus. To the former class of cases belong severe trigeminal neuralgia, the familiar toothache affecting quite sound teeth at the very beginning of pregnancy, intercostal neuralgia, and paroxysms of mastodynia. The pressure neuralgias affect chiefly the domain of the great sciatic nerve, manifesting themselves by the occurrence of pain down the back of the thigh, in the calf, and on the dorsum of the foot, sometimes associated with formication and other kinds of paræsthesia. Parturition, by its powerful effect on the emotional nature in combination with intense physical suffering, may give rise to numerous nervous disturbances. The chief of these are, neuralgia, occasioned by the pressure of the fœtal head as it passes through the pelvis of the mother, paræsthesias, convulsions, maniacal paroxysms, transitory mental alienation, cerebral hæmorrhages, and eclampsia.