What is the beginning of menstruation called?

What is the stoppage of menstruation called?

Answer the following :

(a) Which hormone is responsible for the changes noticed in females at puberty?

(b) Dwarfism results due to deficiency of which hormone?

(c) Blood sugar level rises due to deficiency of which hormone?

(d) Iodine is necessary for the synthesis of which hormone?

Name the hormones secreted by testes.

Which hormone is secreted by thyroid?