Jones D Y, Judd J T, Taylor P R, Campbell W S, Nair P P
Cancer Prevention Studies Branch, National Cancer Institute, Bethesda, MD 20892.
Hum Nutr Clin Nutr. 1987 Sep;41(5):341-5.
Menstrual cycle and menses lengths were determined in 31 healthy premenopausal women randomized into one of two sets of weight-maintaining diets, those with a ratio of polyunsaturated to saturated fatty acids (P/S ratio) of 1.0 and those with a P/S ratio of 0.3. After a baseline interval of one menstrual cycle, both groups were fed a high fat diet (40 per cent energy from fat) for four menstrual cycles per subject, followed by a similar interval on a low fat diet (20 per cent energy from fat). There was a significant increase of 1.3 d (P = 0.02) in the average menstrual cycle length and 0.5 d (P = 0.01) in menses length on the low fat diet. Although no significant differences were evident between the P/S groups, the effect of low fat on menstrual cycle and menses length was most pronounced in the P/S = 1.0 group.
对31名健康的绝经前女性进行了月经周期和经期长度的测定，这些女性被随机分为两组维持体重的饮食组，一组多不饱和脂肪酸与饱和脂肪酸的比例（P/S比）为1.0，另一组P/S比为0.3。在经过一个月经周期的基线期后，每位受试者的两组均接受了四个月经周期的高脂肪饮食（脂肪提供40%的能量），随后是类似时长的低脂肪饮食（脂肪提供20%的能量）。在低脂肪饮食期间，平均月经周期长度显著增加了1.3天（P = 0.02），经期长度增加了0.5天（P = 0.01）。尽管P/S组之间没有明显的显著差异，但低脂肪对月经周期和经期长度的影响在P/S = 1.0组中最为明显。
