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Vegetarian vs nonvegetarian diets, dietary restraint, and subclinical ovulatory disturbances: prospective 6-mo study.
Am J Clin Nutr. 1994 Dec; 60(6):887-94.AJ

Abstract

Ovulatory function was prospectively assessed over 6 mo in 23 vegetarians and 22 nonvegetarians with clinically normal menstrual cycles. Subjects were 20-40 y of age, of stable weight (body mass index, in kg/m2, of 18-25), on current diets for > or = 2 y, and not using oral contraceptives. Quantitative analysis of basal body temperature records classified cycles as normally ovulatory, short luteal phase (< 10 d), or anovulatory. Subjects completed the Three-Factor Eating Questionnaire (subjects completed the Three-Factor Eating Questionnaire (subscales for restraint, hunger, and disinhibition) and kept three 3-d food records. Vegetarians had lower BMIs (21.1 +/- 2.3 vs 22.7 +/- 1.9, P < 0.05), percentage body fat (24.0 +/- 5.5% vs 27.4 +/- 5.1%, P < 0.05), and restraint scores (6.4 +/- 4.4 vs 9.5 +/- 3.7, P < 0.05). Mean cycle lengths were similar, but vegetarians had longer luteal phase lengths (11.2 +/- 2.6 vs 9.1 +/- 3.8 d, P < 0.05). Cycle types also differed (chi 2 = 9.64, P < 0.01): vegetarians had fewer anovulatory cycles (4.6% vs 15.1% of cycles). Compared with those with restraint scores below the median, highly restrained women had fewer ovulatory cycles (3.6 +/- 2.3 vs 5.0 +/- 1.4, P < 0.05) and shorter mean luteal phase lengths (7.4 +/- 4.1 vs 10.7 +/- 3.1 d, P < 0.05). We conclude that ovulatory disturbances and restrained eating are less common among vegetarians, and that restraint influences ovulatory function.

Authors+Show Affiliations

School of Family and Nutritional Sciences, University of British Columbia, Vancouver, Canada.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

7985629

Citation

Barr, S I., et al. "Vegetarian Vs Nonvegetarian Diets, Dietary Restraint, and Subclinical Ovulatory Disturbances: Prospective 6-mo Study." The American Journal of Clinical Nutrition, vol. 60, no. 6, 1994, pp. 887-94.
Barr SI, Janelle KC, Prior JC. Vegetarian vs nonvegetarian diets, dietary restraint, and subclinical ovulatory disturbances: prospective 6-mo study. Am J Clin Nutr. 1994;60(6):887-94.
Barr, S. I., Janelle, K. C., & Prior, J. C. (1994). Vegetarian vs nonvegetarian diets, dietary restraint, and subclinical ovulatory disturbances: prospective 6-mo study. The American Journal of Clinical Nutrition, 60(6), 887-94.
Barr SI, Janelle KC, Prior JC. Vegetarian Vs Nonvegetarian Diets, Dietary Restraint, and Subclinical Ovulatory Disturbances: Prospective 6-mo Study. Am J Clin Nutr. 1994;60(6):887-94. PubMed PMID: 7985629.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Vegetarian vs nonvegetarian diets, dietary restraint, and subclinical ovulatory disturbances: prospective 6-mo study. AU - Barr,S I, AU - Janelle,K C, AU - Prior,J C, PY - 1994/12/1/pubmed PY - 1994/12/1/medline PY - 1994/12/1/entrez SP - 887 EP - 94 JF - The American journal of clinical nutrition JO - Am. J. Clin. Nutr. VL - 60 IS - 6 N2 - Ovulatory function was prospectively assessed over 6 mo in 23 vegetarians and 22 nonvegetarians with clinically normal menstrual cycles. Subjects were 20-40 y of age, of stable weight (body mass index, in kg/m2, of 18-25), on current diets for > or = 2 y, and not using oral contraceptives. Quantitative analysis of basal body temperature records classified cycles as normally ovulatory, short luteal phase (< 10 d), or anovulatory. Subjects completed the Three-Factor Eating Questionnaire (subjects completed the Three-Factor Eating Questionnaire (subscales for restraint, hunger, and disinhibition) and kept three 3-d food records. Vegetarians had lower BMIs (21.1 +/- 2.3 vs 22.7 +/- 1.9, P < 0.05), percentage body fat (24.0 +/- 5.5% vs 27.4 +/- 5.1%, P < 0.05), and restraint scores (6.4 +/- 4.4 vs 9.5 +/- 3.7, P < 0.05). Mean cycle lengths were similar, but vegetarians had longer luteal phase lengths (11.2 +/- 2.6 vs 9.1 +/- 3.8 d, P < 0.05). Cycle types also differed (chi 2 = 9.64, P < 0.01): vegetarians had fewer anovulatory cycles (4.6% vs 15.1% of cycles). Compared with those with restraint scores below the median, highly restrained women had fewer ovulatory cycles (3.6 +/- 2.3 vs 5.0 +/- 1.4, P < 0.05) and shorter mean luteal phase lengths (7.4 +/- 4.1 vs 10.7 +/- 3.1 d, P < 0.05). We conclude that ovulatory disturbances and restrained eating are less common among vegetarians, and that restraint influences ovulatory function. SN - 0002-9165 UR - https://www.unboundmedicine.com/medline/citation/7985629/Vegetarian_vs_nonvegetarian_diets_dietary_restraint_and_subclinical_ovulatory_disturbances:_prospective_6_mo_study_ L2 - https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/60.6.887 DB - PRIME DP - Unbound Medicine ER -