The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.     
3. Wumei have clients throughout the world:
1. Professional service and rich experience make customers feel at ease, adequate stock of all kinds of steroid materials and fast delivery meet their desire.
2. Uses feedback will be appreciated, your suggestions will guild us to improve our service , and it is our responsibility to meet all clients requirements .
3. Wumei Technology is one of the most reliable supplier of steroid raw materials with best quality goods , safe &fast shipping ,good service .
Welcome to contact us if you have interest in our steroid Raw materials or growth hormone!
Trenbolone is without a doubt one of the most beneficial anabolic steroids on the market. When we consider the therapeutic benefits of Nandrolone, or even Testosterone, it may not quite match up but on the basis of raw power and physique transformation Trenbolone Acetate is the king. No steroid will be as beneficial when cutting, not even close, and when bulking it is nothing short of fantastic. While Tren is beneficial during cutting and bulking phases, if you’re only going to use it in one phase always choose cutting. Many will actually need to limit their Trenbolone Acetate use to one phase due to the harshness of the compound in some men, especially when we consider cardiovascular strain. However, solid responders who are in excellent health should find they can use the steroid during both phases with a high level of success.