How can I tell if my cat is in heat after giving birth?

After giving birth, a cat can go into heat as soon as a week later. Signs that your cat is in heat include increased vocalization, restlessness, rubbing against objects, and a desire to escape outside. Additionally, she may display more affectionate behavior and assume a mating position. If you suspect your cat is in heat after giving birth, it is best to consult with a veterinarian for guidance.