The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Delayed Menarche and Amenorrhea in Ballet Dancers
Open accessAbstract
YOUNG female ballet dancers attending professional schools or dancing in companies in which thinness is much admired restrict their food intake and are highly active. The unusual eating habits and levels of activity of some of these dancers have been related to lack of menstrual cycles.1 Amenorrhea and late menarche among girls and women with average activity levels are associated with undernutrition and weight loss in the range of 10 to 15 per cent of the normal weight for height; such weight loss apparently reduces the fat/lean ratio to less than a critical level. We report here on 89 young ballet dancers among whom there was a high incidence of primary amenorrhea, secondary amenorrhea, irregular cycles, and delayed menarche — an incidence correlated with excessive thinness.
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Frisch, R. E., & McArthur, J. W. (1974) · Science · doi:10.1126/science.185.4155.949 · Cited by 1,412
Self-citation
Research works printed but not linked: 12
- Frisch, 1972, Pediatrics, 50, 445, 10.1542/peds.50.3.445 · DOI
- 10.1056/NEJM197711242972103 · DOI · Paper page
- Schindler AE, Frick V, Mikschi M, et al. Evaluation and long-term follow-up of patients with psychogenic amenorrhea. In: Zichella L, Pancheri P, eds. Psychoneuroendocrinology in reproduction. Amsterdam: Elsevier/North-Holland, 1979:263–74.
- 10.1097/00006254-197604000-00026 · DOI
- 10.1136/adc.46.249.695 · DOI
- Sargent, 1963, Am J Clin Nutr, 13, 318, 10.1093/ajcn/13.5.318 · DOI
- Warren, 1979, Endocrinology, 104, 239
- 10.1016/S0140-6736(78)92294-8 · DOI
- Malina, 1978, Med Sci Sports, 10, 218
- 10.1056/NEJM197911293012203 · DOI
- 10.1136/bmj.1.5852.520 · DOI
- Pařízková J. Physical activity and body composition. In: Brožek J, ed. Human body composition: approaches and applications. Vol. VII. Oxford: Pergamon Press, 1965:161–76.
Cited by
Early onset of reproductive function in normal female mice treated with leptin
Chehab, F. F., Mounzih, K., Lu, R., & Lim, M. E. (1997) · Science · doi:10.1126/science.275.5296.88 · Cited by 822
Henderson, B. E., & Feigelson, H. S. (2000) · Carcinogenesis · doi:10.1093/carcin/21.3.427 · Cited by 821
Rivier, C., Rivier, J., & Vale, W. (1986) · Science · doi:10.1126/science.3003907 · Cited by 531
Evidence for a secular trend in age of menarche
Wyshak, G., & Frisch, R. E. (1982) · New England Journal of Medicine · doi:10.1056/nejm198204293061707 · Cited by 448
Self-citationPhysical activity and cancer etiology: associations and mechanisms
McTiernan, A., Ulrich, C., Slate, S., & Potter, J. (1998) · Cancer Causes & Control · doi:10.1023/a:1008853601471 · Cited by 302
Metadata
- Authors
- Frisch, R. E., Wyshak, G., & Vincent, L.
- Venue
- New England Journal of Medicine
- Publisher
- Massachusetts Medical Society
- Published
- 1980-07-03
- Volume
- 303
- Issue
- 1
- Pages
- 17-19
- ISSN
- 0028-4793 (ISSN-L)
- 1533-4406
- OpenAlex
- W2098914763
- Cited by
- 419
- References
- 1
- FWCI
- 26.79
- Type
- journal article
- Language
- en
- Open access
- green
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- Frisch, R. E., Wyshak, G., & Vincent, L. (1980). Delayed Menarche and Amenorrhea in Ballet Dancers. New England Journal of Medicine. https://doi.org/10.1056/nejm198007033030105
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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