Source of Error in the Clinical Estimation of the Elongation of the Cervix during Labour

THE ELONGATION OF THE CERVIX DURING LABOUR. In a communication to this Society, entitled (< A Study of Two Mesial Vertical Sections of the Female Pelvis,"1 it was pointed out by Dr A. R. Simpson and myself that, during labour, the pubic triangle?i.e., all in front, and inclusive of the anterior vaginal wall?is drawn up. The proof known then for this was given fully in that paper, and need not be recapitulated here. Since then the fact of this elevation has been corroborated in an atlas by Professor Chiara of Milan, giving vertical sections of a woman who died in labour while the foetus was undergoing spontaneous evolution.2 The plates show distinctly the elevation of the bladder above the symphysis pubis, the shortening of the soft parts below the pubis, and the greater thickness of the anterior uterine wall as compared with the posterior, just as in Braune's plate C.3 The evidence on these