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Some may live to be 20 years old, but few really reach maturity.

They reach full maturity at the age of four to five months.

They reach maturity between two and three years of age.

Six children were born to the couple, but only three reached maturity.

It takes them seven or eight years to reach full maturity.

The young stay with their mother for up to one year, when they start to reach sexual maturity.

They reach sexual maturity in about two and a half months.

But for those of us who reached maturity between 1980 and 2000, there was nothing.

They reach sexual maturity at one or two years of age.

They reach sexual maturity by the end of their second year.