Which statement is correct for oogenesis?

(i) The process of oogenesis is markedly different from spermatogenesis.

(ii) Oogenesis is initiated during the embryonic development stage.

(iii) Millions of oogonia are formed within each foetal ovary.

(iv) No more oogonia are formed and added after birth.

(v) Oogonia start division and enter into prophase-II of the meiotic division and get temporarily arrested at that stage, called primary oocytes.

(vi) A large number of Graafian follicle degenerate during the phase from birth to puberty.

(vii) At puberty only 60,000 – 80,000 primary follicles are left in each ovary.