At what stage of development are the gametes formed in new born male and female?

Explanation

(i) In a new born male, spematogenesis (formation of sperms) starts at the age of puberty. It is initiated due to the increase in the release of Gonadotrop in Releasing hormone.
(ii) Oogenesis is the process of development of the female gamete or egg in the ovaries. During foetal development, certain cells in the germinal epithelium of foetal ovary divide by mitosis and produce millions of oogonia or egg mother cells.
(iii) No more oogonia are added after birth. The oogonial cells enter into prophase I ofmeiosis to form primary oocytes which are temporarily arrested at this stage.
(iv) The primary oocytes then become primary follicles. From birth to puberty, a large number of follicles degenerate. At puberty the primary follicle undergoes further development and finally releases the ovum.