Abstract: An apparatus usable for controlling the removal of newborn infants from a maternity ward or other restricted area which includes an electrical transponder member detachably securable to an umbilical cord clamping device such that the transponder is attached to the umbilical cord clamping device when clamped upon the umbilical cord of a newborn infant. The transponder members are positioned within a housing and include a stud extending outwardly therefrom which is adapted to extend through a securement opening defined by the umbilical cord clamping device. When the umbilical cord clamping device is closed the securement opening closes somewhat and thereby attaches the transponder unit with respect to the umbilical cord of the infant. When the infant is discharged from the maternity ward the transponder units can be recycled by removal thereof simultaneously with the umbilical cord clamp.