Table 1. Crossreactivity (%) of relevant steroids in the three EIAs.

E1C EIA		PdG EIA		E3G EIA
Steroid	%	Steroid	%	Steroid	%
Estrone-3-glucuronide	100.0	Pregnanediol-3-glucuronide	100.0	Estriol-3-glucuronide	100.0
Estrone	32.4	Pregnanediol	100.0	Estriola)	100.0
Estrone-3-sulfatea)	15.0	20α-OH-Progesterone	74.7	Estronea)	5.5
Estradiola)	0.7	Progesteronea)	2.3	Pregnenolonea)	2.5
Estradiol-3-glucuronidea)	0.6	5β-Pregnane-3-α,20β-diola)	0.8	Testosteronea)	1.2
Cortisola)	0.1	5β-Pregnane-3-β,20α-diola)	0.2	Estrone-3-sulfatea)	0.7
		5β-Pregnane-3-β-ol-20-onea)	0.1
		Pregnenolonea)	0.1

a) Data were provided by Dr. A. Kambegawa.