Behaviour of the Cervix and the Presenting Vertex in Labour in Blacks and Indians of Natal
The mean durations of the first stage of labour for Black and Indian primiparas and multiparas have been ascertained. These figures are similar to those which have been reported. The upper limits of normal for the duration of the first stage :of labour for primiparas and multiparas have baen ascertained· These figures differ from those which have
been reported in that the duration is much shorter. Interpolated time- and cervix-based graphs showing the rate of cervical dilatation have been constructed. The curves obtained differ from those reported in that they
are not sigmoid in shape and have no distinct phases. Interpolated time-based graphs depicting the rate of descent of the presenting vertex have been constructed. The graphs constructed show the upper and lower limits of normal. They can be used to detect any deviation from normal very early on. The graphs and figures obtained confirm the reliability
of Crichton's principles which have been used as a guide in our unit for the past 15 years in assessing the progress of labour; but recordings of the rate of cervical dilatation, descent of the head, and fetal heart rate, on
a graph, so as to compare these with the established norm in each case, is likely to be advantageous.
S. Afr. Med. J., 48, 791 (1974).
Copyright remains in the Author’s name. The work is licensed under a Creative Commons Attribution - Noncommercial Works License. Authors are required to complete and sign an Author Agreement form that outlines Author and Publisher rights and terms of publication. The Agreement form should be uploaded along with other submissions files and any submission will be considered incomplete without it [forthcoming].
Material submitted for publication in the SAMJ is accepted provided it has not been published or submitted for publication elsewhere. Please inform the editorial team if the main findings of your paper have been presented at a conference and published in abstract form, to avoid copyright infringement. The SAMJ does not hold itself responsible for statements made by the authors.
Previously published images
If an image/figure has been previously published, permission to reproduce or alter it must be obtained by the authors from the original publisher and the figure legend must give full credit to the original source. This credit should be accompanied by a letter indicating that permission to reproduce the image has been granted to the author/s. This letter should be uploaded as a supplementary file during submission.