When this happens, the thyroid gland is no longer under pituitary control. The amount of hormone it produces is dependent on levels of TSI. TSI are the direct cause of hyperthyroidism in Gravesâ disease and various immune system chemicals known as cytokines also contribute to the symptoms that occur in this disorder.
Iguanas are reptiles and nearly all reptiles lay eggs. There are some reptiles that do not lay eggs, but they are very rare. Female iguanas usually lay a clutch of eggs every year once they're mature. If there is no male iguana, she will still lay eggs, but they won't be fertile.
Female turtles will start to lay eggs when they are mature. They will lay eggs with or without a male present. If there is no male present, the eggs will not be fertile and can be discarded. After mating, a female may be able to lay fertile eggs for a few weeks or perhaps longer.As eggs develop inside a female, her appetite will wane. She may fast for the few weeks before eggs are laid.hey will lay eggs with or without a male present. If there is no male present, the eggs will not be fertile and can be discarded. After mating, a female may be able to lay fertile eggs for a few weeks or perhaps longer. As eggs develop inside a female, her appetite will wane.