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.
1 When adult squash bugs come out of the soil in the spring, any females who didnât lay all their eggs last year â can start laying eggs right away. So eggs can be on the plant before the overall population of bugs start to mate.  After the other females mate, they can lay up to 250 eggs.