Our next concern is with the derangement of the discharge at or about the period of cessation: this will consist, 1st, in a diminution of the proper quantity; and, 2dly, in an excess of it. As regards the first, we have already said enough when treating of the suppression of the menses; and, with respect to the second, it must be treated according to the rules prescribed for the management of hemorrhage from the uterus from any other cause, that is, first, to diminish the quantity discharging; secondly, to prevent an excessive return. CONCEPTION; OR, PREGNANCY. CONCEPTION. In order to procreate the human species, there is a periodical discharge of blood from the vagina of every female, termed the catamenia, or menses. The secretion of this fluid commences at that period of life termed puberty, which occurs at different ages, according to the climate. In some latitudes it commences as early as eight or ten, and in others not until fifteen. As soon as conception or pregnancy commences, this discharge ceases, and goes to support the fœtus, or the child. The manner in which conception takes place has ever been a fruitful subject of inquiry, but we are unable to account for this change precisely. It is, however, pretty evident that the semen of the male is introduced into the uterus, while the semen of the female is discharged from the ovaria by means of the Fallopian tubes, the fimbricated extremity of which closely embraces that organ. These tubes, by a kind of peristaltic motion similar to the intestines, convey the semen of the female into the uterus, where it unites with the semen of the male; and it is these united fluids which constitute the rudiment of the fœtus, and which often give to the child the appearance and dispositions of their parents. Sometimes one trait is inherited, sometimes another; at other times a new compound or character is formed (like a chemical union), which does not partake of the nature of either of the former. OF THE MODE BY WHICH PREGNANCY MAY BE DETERMINED. There are certain signs which a female is taught to regard as essential evidences of pregnancy and it is supposed by most, if not by all women, that their presence is absolutely necessary to the existence of this state. In reference to one or two of these signs, this is far from the fact; for they are not unfrequently absent, although pregnancy exist, and the remainder may be present, although pregnancy be absent. Many a female, I am confident, has, from this very circumstance, experienced much difficulty in attaining certainty as to her state, and suffered months of anxiety and doubt. This has arisen from a want of those clear notions, and that precise information, which a question so important demands.