You usually have the biggest gains loss 6-8 weeks after your cycle, that's why a PCT is vital. PCT allows for maintenance and maintaining a large percentage of your gains, without that in place you will experience exactly what you have. Just taking juice and stopping and expecting to keep what you have gained will not happen, juice alone will not make you big and stay big, you have to follow the rules or you will end up close to where you started. Just remember your body has a max axis, this means it will reach a point where it has gained the max muscle naturally, this is know as a platue and sure many of us have experienced it, no matter what you try the platue is reached and very difficult to get past. Gains basically stop, strenght is at a stand still and you get despondent. This is where AAS plays a very important role, you can use AAS to get past that platue and push your bodys max a little higher, but your PCT will determine if your bodys max will return to the old level or stay at the new and higher level, this will allow you to push till your next platue and so the cycle starts again. With out PCT in place you will return to your previous platue and you will just be in a cycle of gaining and losing, but still staying the same or close to that in the long run.
For those who are not familiar with the reasoning behind PCT after an AAS cycle, here is a quick laymans explanation:
When you administer your first artificial test application, your bodys natural test production stops. Why should you produce testosterone when you are administering way higher amounts than you can produce natuarlly and thus the shut down. This happens all through your cycle and not only with test, but other gear as well, so best you have a look at what you on and do some research and see how bad the shutdown actually is, this will also determine what to use in your PCT and what doses. The shutdown is also the reason why your nuts shrink, cause they are affected by the hormone you administer. Right, so now we have and issue when we stop our \"hormone therapy\" for the lack of a better word, cause now our body needs to start producing test in the natural way or we become catabolic and cortisol levels rise as well as estrogen levels and this causes catbolism and nasty sides start creaping in like gyno and things like this. So, what we do is give the body a little kick start and shove in the right direction, fisrtly and depending on your hormone you adminstered we need to stop the conversion to estrogen, hence the Kessar drug, we then need to boost natural test with Clomid and throw in some Tribulus to get the sperm count up cause that also drops, some Pregnyl (HCG) to help with natural test production as well as a combo of this and clomid is advised when using AAS that shuts you down in a big way, basically most to all inj test.
PCT allows for a gradual drop in test in the body and not a sharp drop, cause that's where all the losses of gains happens, this is also wise as you will even tually have fertility problems etc if you have a continuous zig-zag and don't allow for natural function to be restored. Thyroid issues also creep in and you don't want to walk that road.
In closing, doing juice is just not about the cycle it self, but what happens during i.e. diet and training and what happens after i.e. PCT, there is allot more damage done without PCT in place than loss of gains and you will only see the damage in the long term and that will be allot more difficult to correct then than it is to implement a PCT after your cycle.
Hope this is a little more informative to the lay people and just the tip of the iceberg.
Oh yes, this is also why you are not advised to use AAS before 25 or so as the impact on fertitility is real as your body is still producing large amouts of test compared to later in life, but some people don't care, so if you are then even more reason to do a PCT after your cycle.
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