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.
Confidence votes 20. Female Iguanas will lay eggs when they become sexually mature, which is around 1.5 to 2 years old. They do not need to be fertilized to lay so therefore do not need a male Iguana. They need to be healthy before they lay or else there can be very serious problems.
Your iguana will starve to death on a steady diet of iceberg lettuce. Baby iguanas need to eat twice each day. Their food should be chopped finely, and mixed well. As they get older, they can eat coarsely chopped leaves, and will only need to be fed once a day. Adults (over 3 years old) only need to be fed every other day.