We are a research and production company specializing in animal health products such as veterinary drugs, mixed feed additives, and pre mixed feed additives
language
Swine Reproductive Disorders and Hormonal Regulation – The Core Technology for Improving Pig Farm Profitability
Release time:
2026-09-03
I. Reproductive Disorders: The Greatest "Hidden Profit Killer" in Large-Scale Pig Farms
As the pig industry transitions toward intensification, reproductive disorders have become one of the most important diseases in large scale pig farms, with an incidence rate of 20%–40% (averaging over 30%). In some farms, the culling rate of sows due to reproductive disorders can be as high as 20%–30%.
Reproductive disorders mainly manifest as abortion in pregnant sows, stillbirths, mummified fetuses, weak piglets, deformities, reduced litter size, and infertility in both boars and sows. Common causes include viral diseases such as Porcine Reproductive and Respiratory Syndrome (PRRS), Porcine Parvovirus Infection, Pseudorabies, Porcine Circovirus Disease, Classical Swine Fever, and Japanese Encephalitis, as well as reproductive tract diseases like endometritis.
The economic losses caused by reproductive disorders are substantial—non productive days (NPD) are the core metric: each additional NPD per sow means a loss of 30–50 yuan in feeding costs and a reduction of more than 0.5 piglets. For a 500 sow farm with an average NPD of 60 days, the annual hidden loss can reach hundreds of thousands of yuan. In addition, each return to estrus costs about 912.5 yuan per sow. More than 35% of culled sows are eliminated due to reproductive tract inflammation, and the cost of raising a replacement gilt is approximately 2,000–3,000 yuan—premature culling means this investment is written off before it can be recovered. A single PRRS outbreak can cause total losses (including production losses, disrupted breeding schedules, depreciation, labor, and treatment costs) of up to around 10 million yuan.
Sow health and reproductive performance are at the core of pig production, directly determining farm profitability.
II. Hormonal Regulation: The Core Technology for Overcoming Reproductive Disorders
Hormonal regulation technology has become an essential tool for large scale pig farms to improve reproductive efficiency. Through precise administration of exogenous hormones, it is possible to achieve synchronized estrus, timed artificial insemination, and synchronized farrowing—thereby significantly shortening NPD, improving sow utilization, and enabling batch production management.
(1) Gonadorelin – The Core Hormone for Synchronized Estrus and Timed Insemination
Gonadorelin is a highly active GnRH analogue that promotes the release of FSH and LH from the anterior pituitary gland, thereby synchronizing ovulation in sows. In batch production systems, gonadorelin is typically used in combination with altrenogest and PMSG to achieve precise timed insemination. After injection, sows ovulate within a concentrated window of 40–42 hours. Performing artificial insemination at 24 hours and 40 hours post injection significantly improves the conception rate.
(2) Cloprostenol – A Versatile Tool for Synchronized Farrowing and Postpartum Recovery
Cloprostenol is a highly active prostaglandin F2α analogue with potent luteolytic activity. It also excites uterine smooth muscle contraction and relaxes the cervix. Its main applications in pig farms include:
Induction of synchronized farrowing: Minimizes piglet age differences and ensures high uniformity; sows farrow during daytime for easier supervision; reduced age differences prolong suckling time and accelerate uterine involution, improving post weaning estrus rates.
Postpartum care and uterine involution: Intramuscular injection of 0.2 mg on the second day after farrowing promotes lochia discharge; administration of 0.2 mg daily for 3 consecutive days (days 1–3 postpartum) speeds up uterine recovery by 30%.
Treatment of endometritis and other uterine diseases: After diagnosis, inject 0.2–0.4 mg to promote purulent discharge, combined with antibiotics for 3 consecutive days for best results. For retained placenta, inject 0.4 mg intramuscularly, repeat at 6 hour intervals; the expulsion rate reaches 96% within 24 hours.
Treatment of anestrus caused by persistent corpus luteum: Inject 0.2–0.4 mg to induce luteolysis; often combined with PMSG for enhanced efficacy.
Estrus induction in weaned sows: For sows that have not returned to estrus within 5 days after weaning, inject 0.4 mg intramuscularly; estrus occurs within 3–5 days, and when combined with ovulation inducing hormones, the conception rate exceeds 85%.
III. Conclusion
Swine reproductive disorders remain a key factor constraining cost reduction and efficiency improvement in the pig industry. The losses from extended NPD, returns to estrus, and culling are quietly eroding farm profits.
Gonadorelin Injection and Cloprostenol Injection, as core hormonal drugs for reproductive regulation, play irreplaceable roles in synchronized estrus timed insemination, synchronized farrowing, postpartum recovery, and uterine disease treatment. Scientifically and rationally using these two hormones can help pig farms:
✔ Shorten non productive days and reduce feeding costs
✔ Improve conception and farrowing rates
✔ Achieve batch production management with “all in, all out” to block disease transmission
✔ Reduce piglet mortality and increase weaning survival rates
✔ Lower sow culling rates and extend the productive lifespan of breeding stock
Ensure every sow is bred and farrows at the optimal time, turning every investment on the farm into tangible returns.
Latest updates
FOLLOW US
ENQUIRY NOW
* Note: Please be sure to fill in the information accurately, we will contact you as soon as possible