Mating Resources from Pets Directory

Animal Planet: Adolescence and Sexual Maturity - Describes the stages of development in a cat's life from kittenhood to full sexual maturity.

Purina Cat Chow: How Often Do Cats Come into Heat? - Explains how often cats come into heat and how long the heat period is.

The Winn Feline Foundation: The Estrus Cycle of the Queen - Explains the estrus cycle and ovulation in queens.