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As a growth promotion additive for livestock rearing, melengestrol acetate can improve feeding efficiency, thereby accelerating the weight gain of livestock.Melengestrol acetate (MGA) is a potent synthetic progestin used exclusively in feedlot heifers to suppress estrus and promote growth. Its primary selling point is exceptional oral activity, allowing easy administration via feed without implants. By preventing heat cycles, MGA reduces aggressive behavior and stress, significantly improving feed efficiency and weight gain rates. This leads to lower production costs and higher profitability for cattle operators. Additionally, it often enhances carcass quality, yielding better marbling scores. Its high potency means only micro-doses are needed daily, making it a cost-effective solution for large-scale operations. Approved by the US FDA, it streamlines herd management by eliminating the labor of individual injections. However, its use is strictly prohibited in many global markets, including the EU and China, limiting its application to specific regions. For compliant operations, MGA remains a superior tool for optimizing beef production efficiency and consistency.
| Items | Specifications | Results |
| Appearance | Light yellow crystalline powder | conform |
| Melting point | 219℃ ~ 226℃ | 222℃ ~ 224.5℃ |
| Specific rotation | -132.0°~ -122.0° | -129.8° |
| Loss on drying | ≤0.5% | 0.06% |
| Heavy metals | ≤0.001% | ＜0.001% |
| Assay | 97.0~103.0% | 98.4% |
| Product parameters | |
| Cas number: | 2919-66-6 |
| Appearance: | Light yellow crystalline powder |
| Purity: | 97~103% |
| Package details: | 1kg/foil bag; 25kg/drum |
| Brand: | Fortunachem |
Melengestrol acetate (MGA) is a synthetic progestin (a progesterone-like hormone) primarily used in veterinary medicine, specifically for cattle. Chemically, it is a potent derivative of progesterone with added methyl and methylene groups that enhance its oral activity and stability.
Its primary functions are estrus (heat) suppression and growth promotion in feedlot heifers. By preventing the energy loss associated with estrous cycles and reducing aggressive behavior, it allows cattle to convert feed into muscle more efficiently.
Key Selling Points & Advantages
Superior Growth Promotion and Feed Efficiency:
MGA is highly effective at improving the feed-to-gain ratio. Cattle treated with MGA typically gain weight faster and require less feed per pound of gain compared to untreated animals, directly increasing profitability for feedlots.
Effective Estrus Suppression:
It reliably suppresses heat cycles in heifers. This eliminates the behavioral issues associated with estrus (such as riding, bawling, and reduced feeding), leading to a calmer herd, reduced stress, and fewer injuries.
High Oral Potency:
Unlike natural progesterone, which is ineffective when swallowed, Melengestrol acetate is highly active orally. This allows it to be easily administered as a feed additive (premix) without the need for implants or injections, simplifying large-scale herd management.
Improved Carcass Quality:
Studies often show that MGA usage can lead to improved marbling and overall carcass quality grades, commanding higher prices at slaughter.
Cost-Effectiveness:
Due to its high potency, it is required only in very small concentrations (typically 0.5 mg per head per day), making it an economical solution for large operations.
Regulatory Acceptance (Region Specific):
It is approved by the US FDA for use in feedlot heifers.
Critical Note for Global Trade: It is banned in many other regions, including the European Union, China (listed in the prohibited substances catalog for food-producing animals since 2020), and others, due to concerns over hormonal residues in meat. Its "selling point" is therefore strictly limited to markets where it is legally permitted.
Typical Applications
Feedlot Heifers: Mixed into feed to suppress estrus and promote growth.
Research: Used as a reference standard in analytical chemistry for detecting hormone residues in food safety testing.
Disclaimer: The use of Melengestrol acetate is strictly regulated. It is illegal to use in food-producing animals in many jurisdictions. Always verify local regulations before purchase or application.
Melengestrol acetate is an excellent progesterone for animal,usually used in cows' estrus synchronization or growth promoter.
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