Mother, Nurse and Infant / A Manual Especially Adapted for the Guidance of Mothers and Monthly Nurses, Comprising Full Instruction in Regard To Pregnancy, Preparation for Child-birth, and the Care of Mother and Child, and Designed to Impart so Much Knowledge of Anatomy, Physiology, Midwifery, and the Proper Use of Medicines as Will Serve Intelligently to Direct the Wife, Mother and Nurse in All Emergencies.

by S. P. Sackett

The soft parts lining the pelvis and covering it externally modify the diameters of the pelvis, but the effect of these additions in diminishing the internal diameter is not very great. The diameter of the cavity is lessened thereby from one-fourth to one-half an inch.

USES OF THE PELVIS.

One function of the pelvis is to inclose and protect the bladder, rectum and seminal vesicles of the male, the uterus, Fallopian tubes and ovaries, as well as the bladder and rectum in the female. During labor it affords a passage for the child.

TERMINAL OUTLET OF THE PELVIC CANAL.

This is not at the coccyx, but rather at the anterior commissure of the perineum. This is so greatly distended at the last moment of labor as to much prolong the posterior wall of the pelvic excavation and the canal to be traversed by the fœtus. (Fig. [8]).

Fig. 9—Section of sacrum and pubis.
Measuring superior strait.

Fig. 10.
Measuring inferior strait.

CHAPTER II.
PARTS CONTAINED IN THE PELVIS.