Gains definitely slow down. Change up the compounds, keep your body guessing. I have done a 8 week NPP blast, then 8 week tren ace blast back to back. Keep the gains rolling.
That is your body saying that it has been working overtime and needs a break. You have been taxing your endocrine system, your cardiovascular system, liver, neural pathways, etc. Your body needs a break or like professional bodybuilders, you have to really start upping the doses.
Due to myostatin, gains level off around week 8. Backloading with an oral helps to keep things going.
I <3 bro science ️