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He showed all normal labors had similar patterns of dilatation and descent, differing only in the durations and slopes of their component parts. These observations led to the formulation of criteria that elevated the assessment of labor from a rather arbitrary exercise to one guided by scientific objectivity. Researchers worldwide confirmed the basic nature of labor curves and validated their functionality. This system allows us to quantify the effects of parity, analgesia, maternal obesity, prior cesarean, maternal age, and fetal presentation and position on labor. It permits analysis of outcomes associated with labor aberrations, quantifies the effectiveness of treatments and assesses the need for cesarean delivery. Also, dysfunctional labor patterns serve as indicators of short- and long-term risks to offspring. We still lack the necessary translational research to link the physiologic manifestations of uterine contractility with changes in dilatation and descent. Recent efforts to interpret electrohysterographic patterns hold promise in this regard, as does preliminary exploration into the molecular basis of dysfunctional labor. For now, the clinician is best served by a system of labor assessment proposed more than 60 years ago and embellished upon in considerable detail since.<\/jats:p>","DOI":"10.1515\/jpm-2017-0018","type":"journal-article","created":{"date-parts":[[2017,3,22]],"date-time":"2017-03-22T10:04:26Z","timestamp":1490177066000},"page":"1-8","source":"Crossref","is-referenced-by-count":19,"title":["The assessment of labor: a brief history"],"prefix":"10.1515","volume":"46","author":[{"given":"Wayne R.","family":"Cohen","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology , University of Arizona College of Medicine , 4841 North Valley View Road , Tucson , AZ 85718, USA , Tel.: 646-270-5518, Fax: 520-505-4213, E-mail:"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emanuel A.","family":"Friedman","sequence":"additional","affiliation":[{"name":"Department of Obstetrics , Gynecology and Reproductive Biology, Harvard Medical School , Boston, MA , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","published-online":{"date-parts":[[2017,3,22]]},"reference":[{"key":"2025021711142144132_j_jpm-2017-0018_ref_001_w2aab3b7c47b1b6b1ab2b1b1Aa","unstructured":"Graham H. 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