Timing of High-glucose Diet in the Lifecycle Impacts Fertility Phenotypes.

Human metabolic diseases and high-sugar diets have been associated with infertility. Previous studies show that high-glucose diet also affects fertility in leading to decreased offspring production and delayed reproductive timing. We tested whether the timing of glucose exposure affects these fertility defects or the embryo to larval transition. We found that decreased offspring production was strictly a response to high-glucose exposure in adulthood, whereas the delayed reproductive profile was influenced by both developmental and adult diets. We found no effect of high-glucose diet on the number of embryos that develop to the first larval stage. Together, these results suggest that the decreased offspring production and delayed reproductive profile may be separable phenotypes, and that a high-glucose diet reduces the number of offspring by interfering with processes regulated during adulthood.