Table 3.

E2 levels and endometrium thickness categorized according to percentile analysis of E2 levels measured on P initiation day of an artificial endometrium preparation cycle for FRET

day	E2 level(pg/ml)			p	Endometrium thickness(mm)			p
	Group 1	Group 2	Group 3		Group 1	Group 2	Group 3
Day2	43 ± 12.4	52 ± 15.5	50 ± 17.9	NS	5.5 ± 1.9	5.8 ± 2.0	5.7 ± 1.9	NS
Day12	90.4 ± 18.4	121.8 ± 23.5	156.4 ± 39.6	0.03	6.9 ± 0.18	6.7 ± 0.11	7.0 ± 0.14	NS
Day of P initiation	110 ± 20.5	191.9 ± 27.7	299 ± 48.9	< 0.01	9.3 ± 0.12	8.9 ± 0.07	9.1 ± 0.11	NS