In what circumstances that mens's testeterone will convert to estrogen?

Conversion: As men gain weight - mainly fat - the testosterone level is markedly decreased with an increase in estrogen. Once testosterone replacement is begun -least expensive with injections compared to creams etc. - your energy should increase and you fat decrease. The estrogen will also decrease. After 6 months you would probably need a smaller pair of trousers with 4-6 inches decrease in your waist size.