In the first stage of female dogs, within 1-2 weeks of the initial mating, it is very important to strengthen the management of pregnant female dogs. Although mating has been completed at this time, animal B-ultrasound examinations can show that there may still be follicles developing on the female dog's ovaries. The female dog continues to show a series of sexual behaviors for courtship and mating. The female dog also continues to show a series of behaviors of continued estrus, such as impatience, restlessness, constant search for opportunities to go out, no appetite, frequent drinking, etc. There is still a high concentration of estrogen in the urine of the female dog, which can attract male dogs to sniff and cause sexual excitement in male dogs. In order to find an opportunity to go out, the female dog may jump over a high fence and drill through the gap in the fence, which may cause re-mating, or early miscarriage due to excessive activity and squeezing. At the same time, the newly formed embryo has not yet formed a stable connection with the mother. The strong contraction of the female dog's uterine sphincter and the large squeezing of the mother's abdomen will interrupt the pregnancy or cause early hidden miscarriage. Animal B-ultrasound should be checked regularly. Since abortion is most likely to occur in the first three weeks of pregnancy, if conditions permit, the female dog should be kept in a single kennel after mating. Careful observation and care must be carried out. At the same time, strangers should not be allowed to approach the kennel to prevent the pregnant female dog from being nervous. Avoid noisy noises to disturb the female dog and keep the environment quiet.

No intense exercise is allowed during this stage. Climbing, jumping, bathing or swimming and other intense activities are prohibited. Training should be suspended, but walking exercises should be insisted on. The exercise time should not be less than 3 hours a day to enhance physical fitness and promote embryo development. animal B-ultrasound should be used to check the embryo of the female dog regularly. It is best to use a leash when going out to facilitate control and prevent chasing and fighting with other dogs and other intense activities that are likely to cause abortion. In winter, the dog should be led outdoors for sunbathing.