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.
Around 21 days after mating has occurred, the females lay their eggs. After a short incubation period of just 10 to 14 days, the tiny naked young hatch. In most cases, the female platypus will lay between one and four leathery-shelled lizard-like eggs in an elaborate nesting burrow filled with wet leaves as bedding.