Fort Dodge CALF IMPLANTS For Increased Rate of Weight Gain Each dosage consists of 4 pellets containing 100 mg progesterone and 10 mg estradiol benzoate per implantation. This product was manufactured by a non-sterilizing process. Synovex C Calf Implants contain two pure steroid hormones, progesterone and estradiol benzoate. This formulation provides a complementary amount of each hormone for maximal growth stimulation. Study the enclosed instructions carefully and use this product only as illustrated. For Animal Use Only For subcutaneous ear implantation only.