Before entry of sperm into ovum

Simultaneously with first cleavage

After entry of sperm but before fertilization

After fertilization

Seminiferous tubules $$ \to $$ Vasa efferentia $$ \to $$ Epididymis $$ \to $$ Inguinal canal $$ \to $$ Urethra

Testis $$ \to $$ Epididymis $$ \to $$ Vasa efferentia $$ \to $$ Vas deferens $$ \to $$ Ejaculatory duct $$ \to $$ Inguinal canal $$ \to $$ Urethra $$ \to $$ Urethral meatus

Testis $$ \to $$ Epididymis $$ \to $$ Vasa efferentia $$ \to $$ Rate testis $$ \to $$ Inguinal canal $$ \to $$ Urethra

Seminiferous tubules $$ \to $$ Rete testis $$ \to $$ Vasa efferentia $$ \to $$ Epididymis $$ \to $$ Vas deferens $$ \to $$ Ejaculatory duct $$ \to $$ Urethra $$ \to $$ Urethral meatus

in spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed

in spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed

in spermiogenesis spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed

in spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules

hCG, hPL, progestogens, prolactin

hCG, hPL, estrogens, relaxin, oxytocin

hCG, hPL, progestogens, estrogens

hCG, progestogens, estrogens, glucocorticoids