There are various reasons for difficult childbirth in sows, mainly including the following aspects: 1. sow's own factors
1. Early mating age: Due to early sexual maturity, primiparous sows may exhibit estrus symptoms and ovulate, but their bodies are not fully developed and their pelvis is too small, making it difficult to give birth to piglets smoothly.
2. Lack of exercise: The feeding environment is limited, such as single pen feeding and lack of exercise space, resulting in insufficient movement of sows, incomplete pelvic opening during delivery, delayed uterus, and thus affecting the delivery process.
3. Nutrition and obesity: Excessive obesity in sows is also an important cause of difficult childbirth. This may be related to excessive feeding, imbalanced nutrition, and lack of exercise. Obese sows often experience difficulties during delivery due to excessive abdominal fat that compresses the birth canal.
4. Health condition: Sows with certain diseases, such as severe peritonitis, may experience adhesions between the uterus, intestines, and peritoneum, which can affect delivery. Incomplete uterine torsion may also cause uterine delay and prevent piglets from passing through the torsion site after torsion. 2、 Management factors
1. Improper use of oxytocin: During the production process, unreasonable or excessive use of oxytocin may lead to rapid amniotic fluid discharge, uterine paralysis, and even negative pressure suction of piglets in the uterus, resulting in difficult labor.
2. Improper feeding and breeding management: Improper feeding and breeding management is also one of the reasons for difficult delivery of sows. For example, premature mating and imbalanced feed nutrition may affect the physiological condition of sows and increase the risk of difficult childbirth. 3、 Fetal factors
1. Fetal abnormalities: Abnormal posture, position, and orientation of the fetus, or fetal size, deformity, and simultaneous wedging of two fetuses into the birth canal can all lead to difficult delivery in sows.
The reasons for difficult delivery in sows are multifaceted, involving factors such as the sow's own conditions, feeding management, and fetal condition. In order to prevent difficult delivery of sows, strict selection and matching of breeds should be carried out, feeding management during pregnancy should be strengthened, exercise should be appropriately increased, attention should be paid to the health of sows, and management during the delivery period should be strengthened. Any problems found should be dealt with in a timely manner. At the same time, it is necessary to use midwifery drugs such as oxytocin reasonably during the production process to ensure the smooth progress of the delivery process.