Emerges around 3 – 4 months in utero (in flexion, or forwards) and at birth (in extensio or backwards) and is inhibited or suppressed between 3 -4 months after birth (in flexion) and 3 – 4 months to 3 and a half years (in extension).
Essa a 3 – 4 mois in utero (in flexion, o avanza) e a la nassa (in extensio o avanza) e è inhibatto o supprimatto entre 3 – 4 mois a la nassa (in flexion) e 3 – 4 mois a 3 edi anni (in extension).