Changes in estrone and estradiol levels during follicle development: a retrospective large-scale study

Table 4 Comparison of estrogen measurements in the early follicular phase and the ovulatory phase

	Early follicular phase	Ovulatory phase
	(n = 12)	(n = 14)
Serum E2 (pg/mL)
Measured with ST AIA-PACK E2 reagent (A)	58.7 ± 7.9	245.4 ± 50.5
Measured with ST AIA-PACK iE2 reagent (B)	21.3 ± 4.7	262.9 ± 54.2
(A)/(B)	2.9 ± 0.6^a	0.9 ± 0.1^a
Serum E1 (pg/mL)	68.0 ± 13.9	191.1 ± 51.9
E1/E2 (measured with A)	3.4 ± 1.1^a	0.7 ± 0.1^a
Serum E3 (pg/mL)^b	<5.0	<5.0

Data are presented as mean ± standard deviation
^aSignificant differences were found between the early follicular phase and the ovulatory phase groups (P <0.01)
^bSerum E3 concentrations were below the detection range for both groups
E1 estrone, E2 estradiol, E3 estriol

ISSN: 1477-7827