Females may carry 15 - 20 embryos (Bigelow and Schroeder 1953). Yolk sac embryos resemble adults relative to position of the fins and lack of a defined lower caudal lobe. During development, the rostrum is soft and flexible, with rostral teeth remaining entirely enclosed in a sheath of tissue until shortly after birth (NMFS 2000). In Florida, young are born late winter and spring and measure approximately 60 - 80 cm at birth (Simpfendorfer 2005). The sheath of tissue covering the rostrum disappears shortly after birth so young can feed and defend themselves.No records exist for gestation period for smalltooth sawfishes, however, in largetooth sawfish, gestation lasts approximately 5 months, with females producing litters approximately every other year (MNFS 2000).
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