I can't find an answer to this question through google. My male iguana is 7 years old now (52 years old in human years), and he usually has "gone into heat" this time of year by now. He does it every year and it lasts for 4 to 6 months, and he's a handful. He has not done it yet this year. Is it finally over or just delayed? Maybe he took a year off? If anyone knows from experience I'd like to hear about it.