A treatise on the science and practice of midwifery . xth month it is on a level with, ora little above, the umbilicus. About theseventh month it is about two inchesabove the umbilicus, which is now pro-jecting and prominent, instead of de-pressed, as in the non-pregnant the eighth and ninth months itcontinues to increase until the summit of the fundus is immediatelybelow the ensiform cartilage (Fig. 73). A knowledge of the size of theuterine tumor at various periods of pregnancy, as thus indicated, is practical importance, as forming the only guide by whichwe can


A treatise on the science and practice of midwifery . xth month it is on a level with, ora little above, the umbilicus. About theseventh month it is about two inchesabove the umbilicus, which is now pro-jecting and prominent, instead of de-pressed, as in the non-pregnant the eighth and ninth months itcontinues to increase until the summit of the fundus is immediatelybelow the ensiform cartilage (Fig. 73). A knowledge of the size of theuterine tumor at various periods of pregnancy, as thus indicated, is practical importance, as forming the only guide by whichwe can estimate the probable period of delivery in certain cases in whichthe usual data for calculation are absent; as, for example, when thepatient has conceived during lactation. The Uterus Sinks before Delivery—For about a week or more beforelabor the uterus generally sinks somewhat into the pelvic cavity, in con-sequence of the relaxation of the soft parts which precedes delivery, andthe patient now feels herself smaller and lighter than before. This. Size of Uterus at Various Periods ofPregnancy. PREGNANCY. 135 change is familiar to all childbearing women, to whom it is known asthe lightening before labor. The Direction of the Uterus.—AVhile the uterus remains in the pelvisits longitudinal axis varies in direction, much in the same way as thatof the non-pregnant uterus, sometimes being more or less vertical, atothers in a state of anteversion or partial retroversion. These variationsare probably dependent on the distension or emptiness of the bladder, asits state must necessarily affect the position of the movable organ poisedbehind it. After the uterus has risen into the abdomen its tendency isto project forward against the abdominal wall, which forms its chiefsupport in front. In the erect position the long axis of the uterinetumor corresponds with the axis of the pelvic brim, forming an angleof about 30° with the horizon. In the semi-recumbent position, on theother hand,


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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1