<prompt> Cochlear function in fetus develops between12 to 15 weeks18 to 20 weeks22 to 25 weeks30 to 34 weeks  <response>: Cochlear function develops between 22 and 25 weeks, and its maturation continues for six months after delivery.Reference: William;s Obstetrics; 24th edition; Chapter 7; Embryogenesis and Fetal Morphological Development 