The Matron's Manual of Midwifery, and the Diseases of Women During Pregnancy and in Childbed / Being a Familiar and Practical Treatise, More Especially Intended for the Instruction of Females Themselves, but Adapted Also for Popular Use among Students and Practitioners of Medicine

by Frederick Hollick

(By comparing this with Plate VII. the various points will be still more apparent.)

The inferior strait has also four diameters, represented in Plate X.

Plate IX.

Diameters of the Upper Strait.

PLATE X.

The Bones of the Pelvis viewed from below, looking through the inferior strait, to show its diameters.

A B, which extends from the end of the Coccygis to the lower part of the Symphysis Pubis, is called the antero posterior diameter; it measures four inches, like that of the upper strait, but is increased a little by the bending back of the Coccygis.—C D, and E F, are the two oblique diameters, also corresponding to those in the upper strait; they measure four inches, but are increased a little by the giving way of the soft parts.—G H, is the transverse, or bis-ischiatic diameter; it measures four inches.