The reproductive capacity of sows is affected by many factors, including reproductive technology, reproductive heredity of male and female pigs, semen quality of boars, number of ovulation of sows, fertilization ability of eggs and development of embryos. Pig B-ultrasound has a good diagnostic technology for sow pregnancy and ovarian development. In terms of pregnancy diagnosis alone, pig B-ultrasound can reduce a lot of feed waste. Scientific and rational use of pig B-ultrasound can improve reproductive capacity. In modern pig farming, pig B-ultrasound has become a must-have weapon for pig farms.

The main functions of pig B-ultrasound in sow reproduction:

1. Early pregnancy diagnosis: Early pregnancy monitoring with pig B-ultrasound is a simple and effective method that can reduce feed waste, reduce costs and bring higher economic benefits. This function is the most basic function of pig B-ultrasound machine. In terms of selection, it needs to be selected according to its own conditions. Boxianglai recommends models BXL-M1 and BXL-M2.

2. Detect the fetal development: monitor the fetal development by measuring various indicators of the fetus to determine the gestational age of the fetus, predict the date of delivery, monitor the development of the fetus, detect abnormal conditions such as stillbirth, and the situation of postpartum uterine involution. Bo Xianglai recommends the pig B-ultrasound model for fetal detection: BXL-V20.

3. Pig B-ultrasound monitors the development of follicles and ovulation: to determine the breeding time and provide a scientific basis for improving the breeding rate. For modern intensive pig farms, centralized breeding and centralized farrowing can be carried out according to the ovulation monitoring situation. For sows whose follicles have not yet matured, the pig B-ultrasound observation can be used to induce estrus to synchronize estrus, and try to synchronize breeding in the same cycle, so as to improve productivity and economic benefits. Monitoring follicle development is an advanced function of pig B-ultrasound machines. It is difficult for ordinary pig B-ultrasound machines to meet this requirement. Therefore, Bo Xianglai recommends the use of BXL-V30 for observing the development of sow follicles. This model is a domestic series with good quality and cost performance.

Since pig B-ultrasound has such an important function, how to use pig B-ultrasound? Boxianglai Veterinary B-ultrasound Training Center explains the steps in detail:

First, restrain the sow: sows generally do not need to be restrained, just keep quiet. The posture is best to lie on the side, crawling, standing or feeding. For individual sows that are difficult to approach, you can use a pig catcher, a mouth rope or a door panel to squeeze into the corner for exploration. Under the conditions of large-scale pig farming, it can be done in a restricted feeding pen. When exploring the rectum, the sow needs to stand and restrain.

Second, the exploration site: external exploration is generally around the lower abdomen, the upper part of the breast in front of the posterior flank, starting from the posterior and upper part of the last pair of mammary glands (commonly known as milk bags), and as pregnancy progresses, the exploration site gradually moves forward, and can reach the rear end of the ribs after insemination. Pigs have sparse hair, so there is no need to cut the hair during exploration, but keep the exploration site clean. Scrape off dirt and dirt, and apply coupling agent during exploration. When exploring the rectum, it is necessary to really restrain, no coupling agent is required, and the probe can be moistened with disinfectant.

After insemination, the site of exploration: During in vitro exploration, the probe is close to the abdominal wall. During early pregnancy exploration, the probe is facing the front edge of the pubic bone, the direction of the pelvic entrance, or at a 45-degree angle to the opposite side. The probe is close to the skin for a fixed-point fan-shaped scan of the front and back and up and down. The movement should be slow. The embryo is very small in early pregnancy, and Doppler exploration must be careful and slow to detect it. Because before 28-30 days of pregnancy, the uterus usually has not sagged and touched the abdominal wall. After a point exploration is completed, the probe moves forward half to a milk bag and continues to explore until the diagnosis is confirmed.

The application of pig B-ultrasound in sows is mainly image analysis. Correctly analyzing the state shown in the image is the key to using B-ultrasound. Boxianglai Veterinary B-ultrasound Training Center provides technical analysis for everyone based on the main stages of sow insemination.

The characteristics of B-ultrasound images of empty-stomach sows: the empty-stomach uterine horns are located on the left and right sides and in the front and lower part of the bladder. The bladder cavity is a regular liquid dark area without echo. The wall of the empty-stomach uterine horns has weak reflection of ultrasound, and its cross-sectional sonogram shows various irregular circular weak reflection areas. In the figure below, there is no liquid dark area in the uterine area above the curved strong echo, which can be judged that there is no gestational sac in the uterine horn on this side.

Characteristics of B-ultrasound images of sows on 23 and 24 days: the gestational sac in the uterus of sows on 23-24 days of pregnancy is multiple irregular circular or elliptical dark areas with a diameter of 2 to 3 cm, smooth edges, and embryonic spots can be detected in some parts, showing elliptical low-intensity echo light groups or spots. The uterine area is above the strong echo bright line.

Characteristics of B-ultrasound images of sows on 25 days of pregnancy: multiple irregularly shaped gestational sacs were detected on 25 days of pregnancy, and two adjacent gestational sacs and fetal body reflections were displayed in the uterine area.

The characteristics of the B-ultrasound image of the sow at 28 days: four adjacent gestational sacs are displayed in the uterine area at the same time. Among the four gestational sacs, a large gestational sac above the *** has a clear fetal reflection image.

The characteristics of the B-ultrasound image of the sow at 30 days: two adjacent gestational sacs are displayed in the uterine area at the same time. Six gestational sacs are displayed, and a large gestational sac in the middle of the *** has a fetal reflection image with strong echo.

The characteristics of the B-ultrasound images of sows at 46 days: there is a strong echo image of the fetus in the right gestational sac in the uterine area, the bones have begun to calcify, the fetal tissues and organs have begun to differentiate, and the fetus is obvious in the gestational sac.

The characteristics of the B-ultrasound images of sow ovarian cysts: the ovaries are generally weakly echoed and oval in shape, with a diameter of about 1-2 cm (if there are developing follicles, there will be multiple adjacent small round dark areas in the ovaries, but they are difficult to scan. In the case of ovarian cysts, one or several dark areas can be seen arranged regularly, the cyst wall is thickened, and the inner wall is rough and irregular. The single cyst type is a round or oval liquid dark area, and the multicystic type is multiple round or irregular echo-free areas. The cyst structure is sometimes very large, with a diameter of more than 2 cm.

The above content mainly introduces the function, usage and image analysis of pig B-ultrasound in sow reproduction, which is basically the main content of pig B-ultrasound in sow reproduction, for your reference.

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