200 mg progesterone/20 mg estradiol benzoate

Synovex® S helps increase weight gain and improves feed efficiency in feedlot steers.

For increased rate of weight gain and improved feed efficiency in growing beef steers fed in confinement for slaughter. Synovex S is also approved for increased rate of weight gain in growing beef steers fed in confinement for slaughter in a reimplantation program where Synovex C or Synovex S is the first implant and a Synovex S implant is administered approximately 70 days later.

https://www.zoetisus.com/products/beef/synovex-implant-finder/synovex-s/