Husky The signs of pregnancy in the female dog appear about a week after mating. The specific manifestations are: the pudendal part of the conceived female dog will shrink rapidly, and vomiting and appetite may appear in three or four weeks of pregnancy. Depression and other pregnancy reactions. However, during the examination, due to the interference of the corpus luteum, it is impossible to judge whether it is a true pregnancy or a false pregnancy from the above phenomena, so a more scientific method must be used for the diagnosis. In addition, 20-30 days after breeding, a veterinarian can be asked to take a blood sample or use ultrasonic diagnosis and other methods to make an early diagnosis.

There are many methods for diagnosing pregnancy in bitches. Currently, the more commonly used methods are external observation, palpation, ultrasonic detection, hematology, urine Liquid inspection method, etc.

1. External inspection method If an experienced breeder is used, the intuition of local appearance inspection can be used to judge. When the bitch is pregnant, the reproductive system is frequently active in order to nurture new life, and the secretions of the genitals will also increase. At this time, the bitch will often lick it. Dogs with sharply reduced labia 2-3 days after mating are more likely to become pregnant than dogs that continue to be in heat. The labia of the pregnant dog are shrunk, not like the state before estrus. After pregnancy, due to the accelerated blood circulation, the genitals will appear slightly bleeding. Mucus-like secretions flow out. About 1 week after mating, the genitals begin to contract and sag, and a small amount of black-brown fluid can be seen. At 2-3 weeks of pregnancy, the breasts begin to gradually increase, the appetite increases greatly, the coat is bright, the temperament is docile, the movement is slow, stable, and cautious.

At 20 to 30 days of gestation, the pregnant dog had prominent mammary glands, enlarged breasts, and pink nipples. In the first half of pregnancy (about 25 days), the bitch sometimes loses appetite, some will have a partial eclipse, some bitches will have increased appetite, but some dogs will become abnormal, such as eating a lot in the morning, but no appetite at night , and vomiting occurs. In the second half of the period (about a month), the breasts gradually expand, the breasts sag, the nipples are elastic, feel warm when touched by hand, and even milk can be relieved, which is due to the active breasts during pregnancy. The lower abdomen also gradually swelled, and a strong throbbing could be felt. Rapid weight gain and increased urination. At this time, the bitch is more prone to fatigue than before pregnancy, and the action when lying down is also different from usual, showing fatigue, lying down as if to fall. After 50 days, fetal movement can be seen in the ventral side, and fetal canine heart sounds can be heard in the abdominal wall with a stethoscope.

The disadvantage of the external observation method is that inexperienced breeders cannot judge whether the bitch is pregnant at an early stage, because the pseudo-pregnant bitch will also have many of the above-mentioned reactions similar to pregnancy, and when the scheduled delivery date is reached, vomiting, etc. The symptoms will all go away, and the belly will be like a deflated leather ball, which is a big disappointment. In terms of external changes, pregnancy can also be determined by measuring body weight or chest circumference, starting before mating and insisting on regular measurement. Timing means that the measurement should be scheduled at the same time every day or every other day, such as 5 pm every day, after the dog has exercised and excreted, and before eating and drinking at dinner, at the same time and under the same conditions. If pregnant, the pet dog will definitely gain weight day by day. The same is true for measuring the bust. Before mating, record the bust size. After mating, measure the bust at the same time as the body weight. Pay attention to determine the measurement position and fix it at the rib.

2. Palpation method When the bitch is about 20 days pregnant, the uterus begins to become thicker, and the diameter of the uterus can be clearly felt by touching the abdominal wall, but this requires a person with considerable experience to make a more accurate diagnosis. In the fourth week after breeding, the position of the uterus in the abdomen of the female dog can be touched by hand, and the pregnant female dog can feel the embryo that is the size of an egg. After 25 days of gestation, the fetus can be palpated (eg, an egg-sized, elastic ball of meat). Care should be taken to distinguish it from inelastic fecal mass when touched. When touching, use your hands to slide back and forth outside the abdominal wall above the last two pairs of nipples. Do not use excessive force to avoid miscarriage. )

3. Doppler, A-type ultrasonic instrument and B-type ultrasonic instrument are commonly used in ultrasonic detection methods. Doppler examination can be used to detect heart beating in fetal dogs at 19-25 days of gestation. As the fetus develops, its accuracy increases, with 85% accuracy from 36-42 days of pregnancy, 100% accuracy from 43 days to the end of pregnancy, and 100% accuracy when not pregnant. Bitches that are too small have a slightly higher rate of misdiagnosis due to the beating of the abdominal arteries. Type A ultrasonography can be used to diagnose pregnancy after 18-20 days and is 90% accurate at 32-60 days pregnant and 85% accurate when not pregnant. Signals from a bladder full of urine should be distinguished with this test. B-type ultrasonography is more effective than Doppler and A-type ultrasonography. Its advantage is that it can detect 18-19 day old puppies, and even identify the sex, number, and life of puppies.

4. X-ray examination If you want to use X-ray irradiation to measure the fetus, it must be after 7 weeks of pregnancy in the bitch, when the fetus' bones grow to the extent that it can be used for imaging. On the 30-35th day of pregnancy, the shape of the uterus can be seen; on the 49th day, the fetal bone changes can fully show the contrast. In a small number of female dogs 40 days of pregnancy for X-ray examination, the fetal dog's vertebrae and ribs are clearly visible. When using this method, 200-800 ml of carbon dioxide must be injected into the abdominal cavity according to the size of the bitch. In addition, X-rays may be subject to detection errors due to interference from factors such as the irradiation direction, so they are not a foolproof inspection method.

5. Blood test method The blood components of bitches change during pregnancy. According to the changes of these parameters, it can be judged whether the bitch is pregnant, and can distinguish pregnancy from pseudo-pregnancy. From the 21st day of pregnancy, red blood cells, began to decline, to the last week of pregnancy, 70% of the bitches can be reduced to 5 million / ml, the volume of red blood cells decreased by 40%, the hemoglobin ratio decreased, especially in young and improperly raised bitches Maximum; ESR increases, to a maximum by the time of delivery. From the 20th day of gestation, the red blood cell volume continued to decline, and fell to a minimum value of 30 before labor, compared with 45 in non-pregnant bitches. From the 21st day of pregnancy, platelets increase, reaching 500,000/ml before labor; white blood cells increase, reaching a maximum around the 49th day, and then decreasing, but abnormal when it exceeds 30,000/ml. Clotting factor concentrations increase between days 28-42 of pregnancy and decrease until delivery. Fibrin increases 2-3 times during pregnancy. At 21 days of gestation, serum creatinine levels decreased by 25%-33%, averaging 0.8 (0.6-0.9) mg/L in multiparous bitches and 1.1 (0.9-1.2) mg/L in primiparous bitches; serum gamma protein A decrease of 40%-45%, averaged 648 (440-1220) mg/L in multiparous bitches and 1108 (840-1460) mg/L in primiparous bitches.

6. Urine examination 5-7 days after the pregnancy of the French dog, a hormone similar in structure to human chorionic gonadotropin will appear in the urine, so the quick-acting pregnancy test for humans is used. Liquid can test canine urine for substances similar to human chorionic tufts of gonadotropin. If the test is positive, it is pregnant, and if the test is negative, it is not pregnant. The accuracy of this method is quite high, and it can be detected about 6 days after mating.