The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
Taking this hormone while ignoring your diet and lifestyle may yield disappointing results. Regular exercise, healthy diet and stress management are essential for success.
When you are under chronic physical or emotional stress, a stress hormone called cortisol is produced by your adrenal glands. Cortisol and progesterone compete for common receptors in your cells. Therefore, cortisol impairs progesterone activity, which reduces the effectiveness of progesterone therapy or may lead to a condition called "estrogen dominance."
High cortisol also causes an increase in your blood sugar level, which may in turn cause an over-production of insulin. High insulin levels may lead to insulin resistance and production of androgens (male hormones) and thus worsen PCOS symptoms.
Human papillomavirus (HPV). The most common sexually transmitted infection (STI). HPV is so common that nearly all sexually active men and women get it at some point in their lives. There is no treatment for HPV, but in most cases, it goes away on its own and does not cause any health problems. When HPV does not go away, it can cause genital warts and cancers including cancer of the vulva, vagina, penis, or anus. It can also cause cancer in the back of the throat, including the base of the tongue and tonsils. Nearly all cervical cancers are caused by HPV.