Causes of false pregnancy in dogs:

1. Under the influence of hormones, the female dog thinks she is pregnant. Even if she has not mated, it may happen after the estrus period.

2. Inflammation or infection of the uterus will make the female dog think she is pregnant, causing the ovaries to produce a hormone that stops the immune system of the uterus and causes bacteria to multiply.

The main symptoms of false pregnancy in dogs:

The mammary glands of female dogs develop and swell and can secrete milk, and their behavior changes, such as trying to build a nest, increased mothering, and anorexia , vomiting, restlessness, irritability, etc. The abdomen will gradually expand and enlarge. By palpating the abdominal wall, the uterus can be felt to grow and become thicker in diameter, but the fetal sac and fetal body cannot be palpated. The clinical manifestations of pseudopregnancy vary in degree. After 45 days of breeding, the enlarged abdominal circumference of some female dogs gradually shrinks. In severe cases, symptoms near delivery may occur: breast development, milk secretions can be squeezed out, and the vulva is 60 During the first 60 to 70 days of pregnancy, some female dogs have blood-like secretions from their vulva, but there is no contraction.

Diagnostic criteria for canine false pregnancy:

X-ray photography is one of the commonly used identification methods. The main basis is whether there is an outline (skeleton) of the fetus in the expanded uterus.

Treatment methods for canine false pregnancy:

1. Mild cases do not require treatment.

2. There is currently no effective treatment, and symptomatic and supportive therapy is generally adopted. Testosterone can be injected intramuscularly at 2 mg/kg body weight or oral megestrol at 2 mg/kg body weight, once a day for several days. Or intramuscular injection of testosterone and estrogen (diethylstilbestrol) at the same time, the latter may be more effective.

Methods to prevent and treat false pregnancy in dogs:

Bilateral hystero-oophorectomy is the most fundamental measure to prevent false pregnancy.