That's fine. Welcome btw. Your body adapts to steroids by shutting down FSH (follicle stimulating hormone: responsible for sperm production) and LH (lutenizing hormone: produces testosterone). Once you stop using, you body needs some coaxing to start FSH and LH again. This time in between is catabolic so in order to
retain gains proper pct administration is crucial. This is the importance of pct to get LH and FSH up and operating normally again during the time that small amounts of androgens are remaining but your body has not started producing them again.
Oversimplified: steroids shut down fsh and lh, proper pct gets them up and running again.
Check this out for a more detailed but necessary explanation of PCT:
Post Cycle Therapy (PCT) by Anthony Roberts