Morning sickness usually appears during the first few weeks after conception, and continues until the third or fourth month; in some cases it continues throughout pregnancy; in a few it does not begin till much later, and in many it does not appear at all. It scarcely deserves to be called a disease of pregnancy, for it frequently appears as a salutary effort of nature to relieve a cause of much gastric irritation, and, unless it proceeds to a very exhausting degree, must rather be looked upon as a favourable symptom, as it tends to prevent the formation of too much blood, which is so frequent a cause of abortion during the early months. (Hamilton, _on Female Complaints_.) Hence, therefore, experience verifies the correctness of the old proverb, that a "sick pregnancy is a safe one." The ejected matter on these occasions, when there is but little or no food upon the stomach, consists of a glairy ropy mucus, sometimes mixed with a considerable quantity of intensely sour fluid, containing a large proportion of muriatic and acetic acid: in some cases more or less bile is vomited. The treatment of morning sickness will depend in great measure on the severity of the attack: where it is slight, the patient may assist its operation with a little warm water, or chamomile tea: after which the bowels should be briskly opened by a saline laxative, as for instance, a seidlitz powder, sulphate and carbonate of magnesia, &c.: small doses do more harm than good, as, from their slow and ineffective action, they rather tend to increase the irritation and aggravate the symptoms. In severe cases, especially where the pulse is excited, a small bleeding may be used with much advantage, but in most instances the usual treatment of gastric derangement, as it occurs in the unimpregnated state, produces most relief. The bowels should be first opened in the way already mentioned, after which a combination of Pil. Hydrarg. and Extr. Hyosc. or Extr. Humuli, is to be given at night, and a vegetable tonic during the day.