Through the concerted efforts of GLUT2 the high Km glucose transporter , glucokinase the enzyme that phosphorylates glucose , and glucose metabolism, pancreatic beta cells sense blood glucose levels and secrete the appropriate amount of insulin in response 17,18. clomida.com - things to do or avoid while taking clomid In other studies done early postpartum, no changes in plasma prolactin levels hormone needed for milk production or milk production were noted.