[63] Dr. Hunter used to teach, in his lectures, that the final cause of the want of appetite, during the first months of pregnancy, was to obviate plethora, which disposed to abortion. This plethora should have been called an inflammatory disease, in which abstinence is useful. 5. Sizy blood. This occurs almost uniformly in pregnancy. 6. A membrane. Dr. Scarpa has proved the membrana decidua, which is formed during pregnancy, to be in every respect the same in its properties with the membrane which is formed upon other inflamed surfaces, particularly the trachea, the pleura, and the inside of the bowels. Thus we see all the common and most characteristic symptoms and effects of inflammation, in other parts of the body, are exhibited by the uterus in pregnancy. These remarks being premised, I proceed to remark, that blood-letting is indicated, in certain states of pregnancy, by all the arguments that have been used in favour of it in any other inflammatory disease. The degree of inflammation in the womb, manifested by the pulse, pain, and other signs of disease, should determine the quantity of blood to be drawn. Low diet, gentle purges, and constant exercise, are excellent substitutes for it, but where they are not submitted to, blood-letting should be employed as a substitute for them. In that disposition to abortion, which occurs about the third month of pregnancy, small and frequent bleedings should be preferred to all other modes of depletion. I can assert, from experience, that they prevent abortion, nearly with as much certainty as they prevent a hæmorrhage from the lungs: for what is an abortion but a hæmoptysis (if I may be allowed the expression) from the uterus? During the last month of pregnancy, the loss of from twelve to twenty ounces of blood has the most beneficial effects, in lessening the pains and danger of child-birth, and in preventing its subsequent diseases. The doctrine I have aimed to establish leads, not only to the use of blood-letting in the disease of pregnancy, when required, but to a more copious use of it, when combined with other diseases, than in those diseases in a simple state. This remark applies, in a particular manner, to those spasms and convulsions which sometimes occur in the latter months of pregnancy. Without bleeding, they are always fatal. By copious bleeding, amounting in some instances to 80 and 100 ounces, they are generally cured. Let it not be supposed that blood-letting is alike proper and useful in every state of pregnancy. There are what are called slow or chronic inflammations, in which the diseased action of the blood-vessels not only forbids it, but calls for cordial and stimulating remedies. The same feeble state of inflammation sometimes takes place in the pregnant uterus. In these cases cordials and stimulants should be preferred to the lancet.