异常胚胎 <5ng/ml
需保胎 <10ng/ml
可排除宫外 >5ng/ml
孕7周以前 18-32ng/ml
孕7周 52.7-100.1nmol/L
孕8周 64.6-113.8nmol/L
孕9-12周 78-159.2nmol/L
孕13-16周 98.3-185.7nmol/L
孕17-20周 153.8-241.2nmol/L
孕21-24周 234.6-457.4 nmol/L
孕25-34周 40.3.4-626.2nmol/L
孕35周以后 483.6-776.8nmol/L