A friend of mine used Pregnyl after a steroid cycle to restore his testosterone levels. He said it helped him recover, but he also experienced some side effects like increased estrogen levels. He stressed the importance of following a doctor’s advice to use it safely and effectively.
If you are in doubt about taking any type of medication to help with your training, it's important to take advice. In fact, I would go as far as to say you should take advice on most things, especially if you are inexperienced.