Pterostilbene Reverses Age-Related Fertility Decline in Mice Without Side Effects

Age-related fertility decline affects millions of women worldwide, primarily due to deteriorating egg quality that reduces pregnancy success rates. This comprehensive study investigated whether pterostilbene, a natural compound found in blueberries and grapes with superior bioavailability compared to resveratrol, could reverse or prevent age-related reproductive decline.

Researchers divided 80 middle-aged mice (25 weeks old) into four groups receiving different durations of pterostilbene supplementation: control (no treatment), 1 week, 6 weeks, or 22 weeks of treatment. They then evaluated reproductive outcomes through in vitro fertilization and embryo transfer procedures, measuring everything from ovulation rates to live birth success.

The results were striking. Short-term pterostilbene treatment (just 1 week) significantly improved implantation rates in aged mice. Long-term treatment (22 weeks) was even more effective, increasing the number of ovulated eggs, enhancing implantation and live birth rates, and reducing miscarriage rates to levels comparable to young mice. Importantly, serum pterostilbene levels correlated directly with improved fertility outcomes.

At the cellular level, pterostilbene enhanced mitochondrial function in eggs by improving membrane potential and ATP production - key factors in egg quality. Unlike resveratrol, pterostilbene didn't interfere with endometrial decidualization, a crucial process for embryo implantation. The treatment showed no adverse effects on estrous cycles, body weight, or offspring health, with second-generation mice developing normally.

These findings suggest pterostilbene could offer a safe, natural approach to treating age-related infertility, potentially helping women maintain reproductive health longer or restore fertility that has already declined with age.