Dairy intake and semen quality among men attending a fertility clinic

Capsule:
Among men attending a fertility clinic, low-fat dairy intake, particularly low-fat milk, was related to higher sperm concentration and progressive motility, whereas cheese intake was related to lower sperm concentration.

Authors:
Myriam C. Afeiche, Ph.D., Naima D. Bridges, M.D., M.P.H., Paige L. Williams, Sc.D., Audrey J. Gaskins, B.S.E., Cigdem Tanrikut , M.D., John C. Petrozza, M.D., Russ Hauser, Sc.D., Jorge E. Chavarro, M.D., Sc.D.

Volume 101, Issue 5, Pages 1280–1287.e2

Abstract:

Objective:
To examine the relationship between dairy food intake and semen parameters.

Design:
Longitudinal study.

Setting:
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 (

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.

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