If you've worked for a few years consistently before the 3 month layoff and you've cycled before, I don't see any problem with it. You'll probably just get back to where you before you left off quicker. I wouldn't go for more than a light 4 weeker and then workout natural for 2-3 months and then maybe do a heavier cycle. Just my opinion. I know why everyone else is saying no, and if you're really wishy-washy with your training then I agree the answer is no until you get into a regular routine for a few months. But if you do go ahead, don't rush to add weight too quickly, your joints/tendons may not be able to handle it right away.