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.
Do the female iguana lay eggs or are the offspring born alive? Females lay their eggs about 65 days after mating (eggs take 59 to 84 days to develop before they are laid). Over the course of three days, females may up to 65 eggs, each mea â¦ suring around 15.4 mm in diameter, and 35 to 40 mm in length (Frye, 1995).