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The male hormone, testosterone, is produced in limited quantities following treatment with Zeuterin, but after two years, testosterone production is similar to that in untreated dogs. [1] The continuing presence of testosterone means that, unlike surgical castration, chemical castration does not remove the risk of testosterone-associated ...
When given as long-acting implants, these cause “medical castration,” that is, the complete suppression of reproductive activity and the suppression of sex steroids. They have been shown to be effective in both dogs and cats. Compounds that bind and block the GnRH receptor can also cause suppression of fertility and sex steroids.
Cats can tolerate transplantation from unrelated cats, but must be supported with immunosuppressive drugs for the rest of their lives. When the transplanted kidney is implanted in the recipient the original kidneys are usually left in place. [1] There are currently ten centers in the world that offer kidney transplants for cats. Most are in the US.
Testosterone replacement therapy works by increasing the amount of testosterone in your system. You’ll take synthetic testosterone to make up for low levels of the natural hormone in your body.
Testosterone can be taken by a variety of different routes of administration. [2] [3] These include oral, buccal, sublingual, intranasal, transdermal (gels, creams, patches, solutions), vaginal (creams, gels, suppositories), rectal (suppositories), by intramuscular or subcutaneous injection (in oil solutions or aqueous suspensions), and as a subcutaneous implant.
Testosterone is a medication and naturally occurring steroid hormone. [9] It is used to treat male hypogonadism, gender dysphoria, and certain types of breast cancer. [9] [10] It may also be used to increase athletic ability in the form of doping. [9]
This is particularly so considering that bicalutamide increases circulating testosterone levels, and by extension gonadal testosterone production, by up to two-fold in males, [88] and that only a small fraction of normal intratesticular testosterone levels, and by extension androgen action, appears to be necessary to maintain spermatogenesis.
Intratesticular testosterone levels are 20–100 or 50–200 times higher than the concentration found in blood, although there is variation over a 5- to 10-fold range amongst healthy men. [29] [30] Testosterone production does not remain constant throughout the day, but follows a circadian rhythm. The maximum peak of testosterone occurs at 8 a ...