Methods The levels of serum BGP,h CT and iPTH were measured by RIA and IRMA in umbilical blood of 89 neonates and serum of 22 newborn(3d).

• 方法 采用放射免疫与免疫放射分析法测定89 例新生儿脐带血清，22 例出生3 天婴儿血清骨钙素（BGP）、降钙素（h－CT）和甲状旁腺素（iPTH）水平。