On the evolution of sexual receptivity in female primates

摘要

Example ovulation signs, fertility, and receptivity length for two females. Female 1 is denoted by green ( ), and Female 2 by blue ( ). Visible ovulation signs are depicted by the solid vertical bars, fertility probabilities by the lighter-colored lines, and receptivity by the red horizontal bars at the bottom of the graph. Ovulation is assumed to happen on Day 8 for Female 1 and Day 20 for Female 2. Note receptivity length and ovulation signs and magnitude can all vary independently between females, while fertility curves have the same shape for all females.