maturation
mat.u.ra.tion \.mach-*-'ra--sh*n\ \-shn*l, -sh*n-*l\ \m*-'t(y)u.r-*t-iv\ n 1a: the process of becoming mature 1b: the emergence of personal characteristics and behavioral phenomena thro ugh growth processes 1c: the final stages of differentiation of cells, tissues, or organs 2a: the entire process by which diploid gonocytes are transformed into hapl oid gametes involving meiosis accompanied in the female or followed in the male by physiological and structural changes fitting the gamete for its future role 2b: SPERMIOGENESIS - mat.u.ra.tion.al aj
Webster's English Dictionary