Involvement of peritubular myoid cells has been suggested.
In contrast, the presence
of androgen receptors in Sertoli cells of neonatal pigs
suggests that restrictive androgen-mediated signaling directly
at the Sertoli cell might exist in these young pigs, consistent
with apparent differences in how testicular growth and
differentiation are regulated in pigs and rodents, as supported
by our current and previously published observations.