It is an analogue of androgen steroid hormones like testosterone and DHT. Both males and females have both testosterone and estrogen. Taking additional testosterone or other anabolic steroids will increase muscular hypertrophy. Steroidal antiandrogens are antiandrogens that resemble steroid hormones like testosterone and progesterone in chemical structure. Libido in males is linked to levels of sex hormones, particularly testosterone. The gonadotropins signal the gonads to make sex hormones such as testosterone and estradiol. A substantial product of testosterone metabolism in males is estradiol. It works by decreasing gonadotropin and therefore decreasing testosterone and estradiol. The lack of sexual desire in men is because of loss of libido, low testosterone. They catalyze formation of the androgens testosterone and DHT, which in turn regulate hair growth. They catalyse formation of the androgens testosterone and DHT, which in turn regulate hair growth. AAS are testosterone derivatives designed to maximize the anabolic effects of testosterone. This will lead to a fall in testosterone or oestrogen levels and infertility. The drug mimics the effect of testosterone and dihydrotestosterone in the body. This is seen especially in postmenopausal women who have low levels of testosterone.