<prompt> Extremely low bih weight refers to neonates weighing2500 grams2000 grams1500 grams1000 grams  <response>: Low bihweight refers to neonates weighing 1500 to 2500 g; Very low bihweight are those between 1000 and 1500 g; and Extremely low bihweight refers to those between 500 and 1000 g.Reference: Williams Obstetrics; 25th edition; Chapter 42; Preterm bih 