Overview

• Researchers from the University of Tokyo analyzed axillary samples from 21 women across menstrual phases to identify three key fertility-related compounds including (E)-Geranylacetone.
• Male subjects rated fertile-phase odor samples as significantly more pleasant compared to control samples.
• Salivary assays revealed measurable reductions in the stress marker α-Amylase following exposure to fertile-phase scents.
• Published July 29, 2025 in iScience, the study provides quantitative physiological evidence linking olfactory cues to stress reduction.
• Lead author Professor Kazushige Touhara emphasizes that genetic and cultural factors shape odor composition and perception and underscores the need for cross-population validation.