Dr. G. E. Herman, Chairman of the London Midwifery Society — On the change in size of the cervical canal during menstruation. (The British Medic. Journ., 14 / VII, 1894, p. 70). About changes in the canal of the uterine cervix during menstruation

Having reminded the members of the London Midwifery society of the existing disagreement regarding the spatial change of the cervical canal during menstruation, which, according to some, shrinks and swells its mucous membrane, and according to others—expands, Herman outlined the results of his research, namely: 1) During menstruation, there is a slight dilation of the canal. 2) the largest amount of expansion is closed on the 3rd or 4th day of regulation. 3) dilation is observed equally in women with abundant or scanty menstruation, with or without pain, and there is no mutual relationship between these phenomena and the degree of dilation.