Gynecomastia, also known as gyno and bitch tits, is female breast development in men. Gynecomastia is a common side effect of anabolic steroid use. Men naturally produces a small amount of estrogen, a female hormone. When anabolic steroids are used estrogen levels can rise and or dominate.
Some anabolic steroids are peripherally converted to estrogen. When these steroids are used both anabolic hormone and estrogen levels rise. High estrogen levels will sooner or later cause gynecomastia in most individuals.
Abruptly stopping steroid use greatly increases the odds of developing gynecomastia. Anabolic steroid use causes the testicles to atrophy, shrink in size, and become dormant. Normal testicular function usually resumes after steroid use is stopped, but it may take several months for the testicles return to pre-steroid use size and function. When steroid use is abruptly stopped a condition is created where very low levels of anabolic hormones are present. The testicles have not yet resumed normal testosterone production and exogenous anabolic hormones are no longer being taken. As a result, estrogen can now dominate. Gynecomastia is almost certain to occur.
Gynecomastia can usually be avoided by taking anti-estrogens like Nolvadex or using steroids that can not be peripherally converted to estrogen.
I have been around anabolic steroids for 8 years now, and I learn something new everyday. One of the best things that I have learned is that anti-estrogens such as Nolvadex and Proviron really do work, and are certainly worth taking. In my experience, Nolvadex is better than Proviron, but only cause it's stronger, so when you are already taking other pills, it can be a pain in the ass keeping up with all the Proviron. I have seen numerous differences when Anti-estrogens are taken with your regular cycle. Now I'm talking about over a dozen people over a period of a few years, not just one guy, one time.
What you have to realize is that when you take most anabolic steroids, they also have a Androgenic effect as well. To keep it simple, "your Testosterone level is gonna rise". In a way this is a good short term effect, because this is what will cause most of your strength gains, while the anabolic steroids will give you your size gains. But, your body will begin to produce Estrogen to balance the Testosterone levels. So, the more your Testosterone level increases through the amount of steroids you take, and the length of your cycle, the more your Estrogen level will increase as well. This irregular raise in Estrogen, can cause several side effects. The biggest is "gyno" better known as "bitch tits".
Basically, the male body begins to develope female breasts due to the level of estrogen in your body. This is not life threatening, but is very obvious and not too good for your self-esteem, not to mention that your talking thousands of dollars to have them removed, "which most insurance companys won't cover". I have several friends who went through it, and they were the ones who never listened. Of course everyone has a different tolerance to different steroids, but there is a good chance that most people will eventually go through it if they don't take an anti-estrogen.
Even if you have been taking steroids for years, and have never experienced "gyno", it doesn't mean that you won't get it from your next cycle. I have found that the higher the dosages, and the longer the cycles of anabolic steroids, the better your chances for getting "bitch-tits". So, if you have the money, instead of getting a second or a third anabolic steroid to stack during your cycle, take that money and invest in an anti-estrogen. I cannot guarantee that they will prevent "gyno", but it certainly cannot hurt. I have also noticed that when an anti-estrogen is taken, the gains seem to be bigger during a cycle, because you don't have the estrogen limiting the effects of the testosterone.
I found it best to slowly lower the dosage of the anti-estrogen after your cycle is over, so that your body can slowly bring your levels to a balance instead of sky-rocketing your Estrogen level to meet the Testosterone level. Also, I found it best to give a 6-8 week break between cycles to give your body a rest and a chance to get back to normal. As long as you keep lifting, you shouldn't lose too much of your gains, but don't get pissed if you can't bench what you did in the peak of your cycle. So, if you are gonna juice then consider taking an anti-estrogen, but the best way to prevent "gyno" is not to take steroids at all! If your gonna play, just be prepared to pay! Best of Luck, and be smart, no gain is worth a big loss!!!"