The partition coefficient of the ester in question is important because is effects how long the drug itself stays in the system. If the testosterone transfers too quickly from the oil to the blood, the result is a sudden spike in testosterone which then rapidly drops once the dose has been used up. In the example of free testosterone injected into the muscle from a water suspension (as in Aquiviron, mentioned above), the testosterone is essentially immediately available to the bloodstream due to its low partition coefficient, and thus there is an immediate spike of testosterone which is used up quickly in the body.
Because the relationship between long-term androgen use and gynecological health is not yet fully understood, and because many trans men often experience embarrassment and/or access issues over obtaining ongoing gynecological care, some may feel it is appropriate to pursue such surgeries as a preventative measure. Always discuss the latest medical research and the pros and cons of these procedures with your doctor. For more information on hysterectomy, oophorectomy, PCOS, endometrial cancer, and ovarian cancer see the hysterectomy and oophorectomy page on this web site.