Mary Allen
Introduction: Understanding the Canine Estrus Cycle
The canine estrus cycle, commonly referred to as "heat," is a natural reproductive process that female dogs go through. This cycle is controlled by hormones produced by the ovaries, pituitary gland, and hypothalamus. Understanding the estrus cycle is crucial for dog owners who want to breed their dogs or prevent unwanted pregnancies.
The Phases of the Canine Estrus Cycle
The canine estrus cycle consists of four phases: proestrus, estrus, diestrus, and anestrus. During proestrus, the female dog’s vulva swells and she may experience vaginal bleeding. This phase can last from 3 to 17 days. Estrus, also known as the fertile period, is when the female dog is receptive to mating. This phase usually lasts between 5 and 14 days. During diestrus, the female dog’s body prepares for pregnancy, whether or not she has mated. Anestrus is the period of reproductive inactivity, which can last from 2 to 5 months.
The Behavioral Changes in Female Dogs in Heat
During the estrus phase, female dogs exhibit various behavioral changes, such as increased restlessness, frequent urination, and attraction to male dogs. They may also display a "lordosis" posture, where they lower their front legs and raise their hindquarters to facilitate copulation. Some female dogs may become aggressive towards male dogs or their owners during this phase. It is important to keep female dogs on a leash or in a secure area during heat to prevent unwanted mating and aggression.