I am 31 years old male. I feel lack of sexual desire and sometimes problem with erection. I also feel less energetic, mood change irritation, lack of focus etc lately. I got my testosterone level checked and it came out to be 270 ng/dl. My questions are:- 1. Is this testosterone level really low for the person of my age? I have heard that at this age it should be at least 600 plus. 2. Can the low testosterone level be the reason behind lack of desire, erection and other issues I am facing? 3. I use tadalafil while having intercourse but still sometime face erection issue. My wife got pregnant 2 times in last two years but both the pregnancies ended up in miscarriage? I want to know whether using tadalafil or low testosterone could be in any way a reason for miscarriage? 4. Is it true that I could notice sureshot increment in my libido if my testosterone level increases drastically? Means is it guaranteed that my sexual life will surely improve if my testosterone levels are on the higher side. Eg. 700 ng/dl. I desperately need it. 5. I have already started working out again (i used to be a powerlifter earlier, improve my diet and lifestyle. What are the other suggested treatment for low testosterone? I would appreciate if I could get the pointwise answers specific to my queries. Thank you.