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Protein intake and ovulatory infertility
Jorge E Chavarro1, Janet W Rich-Edwards, Bernard A Rosner
1Department of Nutrition, Harvard School of Public Health, Boston, MA 02115, USA. jchavarr@hsph.harvard.edu
American Journal of Obstetrics and Gynecology
|January 30, 2008
Summary
Increasing vegetable protein intake while reducing animal protein may lower the risk of ovulatory infertility. This dietary shift is linked to improved fertility outcomes in women attempting pregnancy.
Area of Science:
- Reproductive health
- Nutritional science
- Epidemiology
Background:
- Ovulatory infertility affects numerous women attempting to conceive.
- Dietary factors, including protein sources, are increasingly recognized for their role in reproductive health.
- Understanding the impact of different protein origins on fertility is crucial for public health recommendations.
Purpose of the Study:
- To investigate the association between dietary protein sources (animal vs. vegetable) and the incidence of ovulatory infertility.
- To quantify the risk of ovulatory infertility based on varying levels of animal and vegetable protein consumption.
Main Methods:
- Prospective cohort study involving 18,555 married women.
- Dietary intake was assessed and correlated with the occurrence of ovulatory infertility over an 8-year follow-up period.
- Statistical analyses, including multivariate adjustments, were used to determine relative risks.
Main Results:
- Higher intake of animal protein was associated with an increased risk of ovulatory infertility (RR 1.39, 95% CI 1.01-1.90).
- Higher intake of vegetable protein showed a trend towards reduced risk (RR 0.78, 95% CI 0.54-1.12).
- Substituting 5% of energy from animal protein with vegetable protein significantly decreased ovulatory infertility risk by over 50% (P=.007).
Conclusions:
- Dietary modification, specifically replacing animal protein with vegetable protein, may be a viable strategy to reduce the risk of ovulatory infertility.
- These findings suggest that protein source is an important dietary consideration for women's reproductive health.
- Further research can explore mechanisms linking protein types to ovulatory function.
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