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Pig technology column
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Sows from pregnancy to production is generally 114 days, but for various reasons, some sows to the expected date of production, there are also sows that have not been produced until the expected date, in order to better do a good job in sow delivery, we need to grasp the signs before the sow gives birth, so what are the signs before the sow gives birth? How do we monitor it? Let's take a look at it together.
1. Due date monitoring
Check the sow record card to see if the due date has been reached, and the sow is about 114 days pregnant to give birth.
2. Sow prenatal symptom monitoring
Two weeks before the sow gives birth, the breast will gradually expand from the back to the front, and there will be a clear boundary between the base of the breast and the abdomen;
One week before the sow gives birth, the nipples will be separated in a "figure of eight" shape to the sides;
4-5 days before sowing, the breasts will be significantly expanded, flushed red and shiny;
3 days before sow delivery, the sow's recumbent action will be steady and cautious;
On the day of sow delivery, the sow will be extremely restless, with her mouth frequently arched, the forelimbs lying on the ground in the shape of a nest; sudden stopping, nervous, up and down, small and soft feces, small but frequent urine.
3. Milk monitoring
When the first two pairs of nipples of the sow are able to express milk, they give birth in about 24 hours;
When the sow's middle nipple is able to express milk, it gives birth in about 12 hours;
When the sow's last pile of nipples is able to express a large amount of milk, it gives birth in about 4 hours.
4. Vulva monitoring
Sow about 3-5 days before childbirth, the sow's vulva gradually swollen, began to flush, a few hours before childbirth, most of the sows will flow mucus, when the sow lies on her side, the tail begins to swing, the anus begins to blame, most of the sows will flow a small amount of red fetal fluid, indicating that the sow is about to give birth.
5. Monitoring of the pelagic part
About 7-14 days before the sow gives birth, the disc ligament gradually softens, until 12-36 hours before delivery, the posterior edge of the ligament begins to become very soft, and the shape gradually disappears to be soft near the tail root, until the tail root collapses, indicating that the sow is about to give birth.
6. Amniotic fluid monitoring
This is the most critical signal for sows to give birth, about 0.5 hours after breaking the amniotic fluid.
7. Litter monitoring
In the process of sow littering, it is necessary to record the time of littering, monitor the sow delivery status and the interval between litters, and timely detect difficult births and assist in childbirth.
Sows normally lay 8-15 minutes apart, when the sows are separated by more than 20 minutes, it is necessary to conduct examinations, analyze the causes, and treat them according to the targeted selection of sow performance.
brief summary
Before the sow gives birth, there will be obvious signs of performance, to observe the signs of sows before childbirth, to achieve timely and effective delivery and midwifery, in order to better improve the economic benefits of the pig farm.
Source: PSY Applied Research Institute