Prepubertal Expansion of Dark and Pale Type A Spermatogonia in the Rhesus Monkey (Macaca mulatta) Results from Proliferation During Infantile and Juvenile Development in a Relatively Gonadotropin Independent Manner1

Abstract excerpt

The purpose of the present study was to determine whether dark and pale type A spermatogonia (Ad and Ap, respectively) are mitotically active during prepubertal development and whether proliferation of these germ cells during this protracted phase of primate development occurs predominantly during infancy before gonadotropin secretion is arrested. Four neonate (1-2 days of age), four infant (4-5 mo of age), and...

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