Fig. 1

Schematic representation of the timing of spermatogenesis in the mouse. The three main phases of the process are shown. Emblematic stages are graphically represented under the timeline, and their postnatal timing of appearance is expressed as days postpartum (dpp). Cell types represented correspond to type A, intermediate (In), type B and preleptotenic (PL) spermatogonia; leptotenic (L), zygotenic (Z), early (eP), medium (mP) and late (lP) pachytenic primary spermatocytes, and diplotenic ones (D); secondary spermatocytes (II); round (RS) and elongating (ES) spermatids, and spermatozoa (spz).

Adapted from reference 94, under the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/)