Umblical cord blood pH, blood gases, creatin posphokinase and MB isoenzyme analyses in preterm infants of ritodrine administered 24-34 weeks pregnant women as an indicator of perinatal asphyxia . Ann Med Res . 2021;3(2):0101-0106. Accessed September 14, 2025. http://annalsmedres.org/index.php/aomr/article/view/2490