Prediction of miscarriage in first trimester by serum estradiol, progesterone and β-human chorionic gonadotropin within 9 weeks of gestation

Table 6 Serum levels of estradiol, progesterone and β-HCG at different gestational ages in normal pregnancy groups

Gestational age	Number of cases	Estradiol (pg/ml)	Progesterone (ng/ml)	β-HCG (mIU/ml)
5-6 weeks	85	559±356	22.69±7.87	5295.98a
7-9 weeks	65	1209±785	25.84±8.61	32549a
P		0.000**	0.025*	0.000**

*,**Significantly (*P<0.05, **P<0.01) higher at 7-9 gestational weeks than that at 5-6 weeks in normal pregnancy women;
a For the geometric mean

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