Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts.
Department of Global Health and Population Global Health MPH Program, Harvard School of Public Health, Boston, Massachusetts; Department of Obstetrics and Gynecology, University of Illinois, Chicago, Illinois.
Fertil Steril. 2014 May;101(5):1280-7. doi: 10.1016/j.fertnstert.2014.02.003. Epub 2014 Mar 14.
To examine the relationship between dairy food intake and semen parameters.
Longitudinal study.
Academic medical center fertility clinic.
PATIENT(S): One hundred fifty-five men.
INTERVENTION(S): None.
MAIN OUTCOME MEASURE(S): Total sperm count, sperm concentration, progressive motility, morphology, and semen volume.
RESULT(S): Low-fat dairy intake was positively related to sperm concentration and progressive motility. On average, men in the highest quartile of intake (1.22-3.54 servings/d) had 33% (95% confidence interval [CI] 1, 55) higher sperm concentration and 9.3 percentage units (95% CI 1.4, 17.2) higher sperm motility than men in the lowest quartile of intake (≤0.28 servings/d). These associations were primarily explained by intake of low-fat milk. The corresponding results for low-fat milk were 30% (95% CI 1, 51) higher sperm concentration and 8.7 percentage units (95% CI 3.0, 14.4) higher sperm motility. Cheese intake was associated with lower sperm concentration among ever-smokers. In this group, men in the highest tertile of intake (0.82-2.43 servings/d) had 53.2% (95% CI 9.7, 75.7) lower sperm concentration than men in the lowest tertile of cheese intake (<0.43 servings/d).
CONCLUSION(S): Our findings suggest that low-fat dairy intake, particularly low-fat milk, is related to higher sperm concentration and progressive motility, whereas cheese intake is related to lower sperm concentration among past or current smokers.
研究乳制品摄入与精液参数之间的关系。
纵向研究。
学术医学中心生育诊所。
155 名男性。
无。
总精子数、精子浓度、前向运动精子比例、形态和精液量。
低脂乳制品的摄入量与精子浓度和前向运动精子比例呈正相关。平均而言，摄入量最高四分位数（1.22-3.54 份/天）的男性精子浓度比摄入量最低四分位数（≤0.28 份/天）的男性高 33%（95%置信区间 [CI] 1，55），前向运动精子比例高 9.3 个百分点（95% CI 1.4，17.2）。这些关联主要由低脂牛奶的摄入量解释。对于低脂牛奶，对应的结果是精子浓度高 30%（95% CI 1，51），前向运动精子比例高 8.7 个百分点（95% CI 3.0，14.4）。奶酪摄入量与曾经吸烟者的精子浓度降低有关。在这个组中，摄入量最高三分位（0.82-2.43 份/天）的男性精子浓度比奶酪摄入量最低三分位（<0.43 份/天）的男性低 53.2%（95% CI 9.7，75.7）。
我们的研究结果表明，低脂乳制品摄入，特别是低脂牛奶，与较高的精子浓度和前向运动精子比例有关，而奶酪摄入与曾经或现在吸烟的男性精子浓度降低有关。
