Birthing piglets, or farrowing, represents a critical phase in swine production where meticulous management directly influences neonatal survival, sow recovery, and overall herd profitability. This process, while naturally orchestrated by the dam, often requires vigilant human oversight to address complications such as stillbirths, crushing, and inadequate colostrum intake. Success hinges on preparation, recognition of normal progression, and the ability to intervene safely when necessary.
Recognizing the Signs of Imminent Farrowing
Effective preparation begins days in advance through careful observation of the sow’s behavior and physical changes. As the vulva relaxes and swells, and the mammary glands begin secreting colostrum—often milking can be seen—the animal typically seeks isolation, displaying nesting behavior by rearranging bedding material. A significant decrease in appetite and increased restlessness usually occur 12 to 24 hours before delivery, signaling that the farrowing area should be thoroughly cleaned and sanitized.
The Three Stages of Labor
Stage One: Cervical Dilation
This initial phase involves uterine contractions and dilation of the cervix, during which the sow may appear agitated, pant, or shudder. No piglets are expelled yet, and this stage can last two to four hours. Providing a quiet, dim environment minimizes stress and allows the process to proceed efficiently without unnecessary human interference.
Stage Two: Expulsion of Piglets
Active straining begins with the presentation of the first piglet, typically emerging every 10 to 20 minutes in a normal litter. The amnion sac usually breaks during expulsion, and the sow will instinctively chew through the membrane around the nose and mouth to clear the airway. This stage continues until all piglets are delivered, with the entire process generally taking one to three hours depending on litter size.
Stage Three: Delivery of Placenta
Following the birth of each piglet, the sow expels a portion of the placenta, completing the farrowing process. Retention of the entire placenta is uncommon, but if observed beyond a few hours, it may indicate an issue requiring veterinary attention. Ensuring each piglet begins nursing promptly stimulates uterine contractions to expel remaining membranes.
Critical Interventions During Farrowing
Human assistance is sometimes necessary, particularly when a piglet is stuck or the sow shows signs of exhaustion. Gentle traction applied to the piglet’s legs only after the sac has ruptured and contractions are coordinated can resolve a breech presentation. Drying and stimulating a weak piglet immediately after birth, especially clearing the nostrils, is vital to initiate breathing and encourage colostrum consumption.
Post-Farrowing Management for Sow and Piglets
After delivery, the sow’s focus shifts to feeding her litter, making it essential to ensure she consumes adequate feed and water to meet increased lactational demands. Piglets require a warm, draft-free environment with a designated creep area, as they lack thermal regulation for the first week. Monitoring individual weight gain and udder attachment within the first 24 hours helps identify piglets at risk and allows for timely supplementation with bottle-feeding if the sow is insufficient.
Common Complications and Preventative Strategies
Stillbirths often result from prolonged farrowing, inadequate nutrition, or infection, while crushing can be mitigated with proper farrowing crate design and attentive supervision during the first few days. Maintaining rigorous hygiene protocols, vaccinating the sow against common pathogens like leptospirosis and parvovirus, and ensuring a consistent nutritional plan throughout gestation all contribute to a smoother birthing process and robust neonatal vitality.
