No even if you cycle correctly your natural test levels drop (I never said stop, your body rarely completely stops making test) because there is no need for your body to make much. Which is why people go on PCT also known as post cycle treatment, to help suppress estrogen and the aromatase enzyme through both competitive and non-competitive inhibition. And steroids are taken in cycles to help minimize this effect, also because results usually slow after 10-12 weeks. I just did a grad-research paper on this, that's why I'm full of otherwise useless info.