Abstract

Men have more kidney stones compared with women; however, the difference is progressively decreasing. The reasons for higher prevalence of stones in men, as well as increasing prevalence in women, is a subject of ongoing speculation. In this review, we summarize the evidence of differences between men and women and expand on the speculative causes. Stone incidence is rising in women and adolescent girls. Stone disease is more heritable among men than women, and women demonstrate greater influence of the unique environment. Women under the age of 50 years who have been pregnant, have more than double the odds of kidney stones compared with those who have never been pregnant. Women are more burdened with obesity, bariatric surgery and dieting, all associated with increased stones. Women have higher urinary pH because of greater absorption of dietary organic anions leading to increased urinary citrate, compared with men, and they differ in tubular calcium handling. It is obvious that the cause of stones in men and women is complex and requires further study. Potential clues offered are in the change of the female environment, influencing increasing incidence in stones, particularly of younger women and female adolescents.

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