Steroids affect the normal testosterone, fsh and lh production levels that a male produces. It essentially shuts down your reproductive system as the artificial testosterone is recognized as being your body's own. Your friends husband may be infertile, but this depends on various factors such as: type of steroid abused, length of cycle and dosage. See the question posted under "male infertility"; user name drmarc, for a firsthand account of what steroids can do to the male reproductive system.
ive been sterile for the past year, 0- zero sperm count, and ive been on every fertility drug they make for seven months, still zero !! i was taking testosterone for almost 18 months, and ive been completely shut down,
im sure he is doing steroids or she wouldnt have asked, or maybe the questrion is for you, its okay, just get the message out that the chance of getting pregneant goes down everyday he stays on the juice, there will come a time eventually that he wont be able to have any kids, and for some its been permanant !!