The Proportion of Night Labors.

C. H. Preston
JAMA. 1905;XLV(17):1261. doi:10.1001/jama.1905.02510170053015.
Text Size: A A A
Published online


Davenport, Iowa, Oct. 14, 1905.

To the Editor:  —In The Journal of this date you refer to White, who considers the idea that a majority of labors terminate at night as probably fallacious and suggests a further consideration of statistics.In the Medical News, Sept. 12, 1891, Dr. G. W. H. Kemper recorded the statistics of 1,000 consecutive cases, 13 of which were twins, the hour of two births not recorded, leaving a total of 1,011 births. Dividing the day into six-hour periods beginning at midnight, there were in the first 291, in the second 267, in the third 222, and in the fourth 231 births, being an excess of 33 in favor of the night hours.Of the 250 consecutive labors of which I have kept notes 81 terminated in the first quarter of the day, 68 in the second, 43 in the third and 58 in the fourth,


Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
First page PDF preview




Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).


Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.