A treatise on the science and practice of midwifery . ric Works. having lost one-half of its length at the sixth month, two-thirds atthe seventh, and to be entirely obliterated in the eighth and correctness of these views was first called in question in recenttimes by Stoltz, in 1826, but Dr. Duncan,1 in an elaborate historicalpaper on the subject, has shown that Stoltz was anticipated by Weit-brech in 1750, and, to a less degree, by Eoederer and other opinion is now pretty generally admitted to be correct, and isupheld by Cazeaux, Arthur Farre, Duncan, and most modern o
A treatise on the science and practice of midwifery . ric Works. having lost one-half of its length at the sixth month, two-thirds atthe seventh, and to be entirely obliterated in the eighth and correctness of these views was first called in question in recenttimes by Stoltz, in 1826, but Dr. Duncan,1 in an elaborate historicalpaper on the subject, has shown that Stoltz was anticipated by Weit-brech in 1750, and, to a less degree, by Eoederer and other opinion is now pretty generally admitted to be correct, and isupheld by Cazeaux, Arthur Farre, Duncan, and most modern obstet-ricians. Indeed, various post-mortem examinations in advancedpregnancy have shown that the cavity of the cervix remains in 1 Researches in Obstetrics. PREGNANCY 127 reality of its normal length of one inch, and it can often be measuredduring life by the examining finger, on account of its patulous state(Fig. 73). During the fortnight immediately preceding delivery,however, a real shortening or obliteration of the cervical cavity takes Fig. Cervix from a Woman Dyiug in the Eighth Mouth of Pregnancy. (After Duucan.) place; but this, as Duncan has pointed out, seems to be due to theincipient uterine contractions, which prepare the cervix for labor. Apparent Shortening.—There is, no doubt, an apparent shorteningof the cervix always to be detected during pregnancy, but this is afallacious and deceptive feeling, due to the softness of the tissuethe cervix, which is exceedingly characteristic of pregnancy, andwhich to an experienced finger affords one of its besl diagnosticmarks. Softening of the Cervix.—In the non-pregnant state the tissue ofthe cervix is hard, firm, and inelastic. When conception occurs,softening begins at the external OS, and pr< tceeds gradually and slowlyupwards until it involves the whole of the cervix. By the end ofthe fourth month both lips of the os are thick, softened, and velvetyto the touch, giving a sensation, likened by Cazeaux to that
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