How long does it take for a female iguana to gain weight after laying eggs?
They don't "gain weight," per se. They get fatter around the middle. It's so gradual that you probably wouldn't notice. If you think it's going to be easy to breed iguanas for profit or fun, you're deluding yourself. It's highly likely your female will die before she lays eggs or, if you are astute, she will need an ovario-hysterectomy to save her life.
a few weeks.