table of contents 
To determine whether estradiol-to-progesterone (E2/P) ratios at the time of embryo …
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Table 1
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Comparison between different parameters for clinical pregnancies, preclinical abortions and non-conception cycles.
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Clinical pregnancies
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Preclinical abortions
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Not pregnant
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P valuea
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(n = 49)
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(n = 27)
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(n = 163)
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Age (y)
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32.2 ± 3.6
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30.8 ± 3.3
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33.1 ± 4.0
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Basal FSH (IU/L)
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7.0 ± 2.6
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7.2 ± 3.1
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7.5 ± 2.5
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NS
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Peak estradiol (pg/mL)
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1325 ± 816
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1110 ± 586
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1143 ± 864
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NS
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Peak progesterone (ng/mL)
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8.5 ± 5
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10.1 ± 6.2
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8.2 ± 6.0
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NS
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No. oocytes/patient
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10.7 ± 6.4
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10.7 ± 5.7
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7.9 ± 5.8
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Duration of stimulation
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9.8 ± 1.3
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9.8 ± 1.1
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10.3 ± 1.4
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NS
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No. oocytes/fertilized
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7.3 ± 4.3
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6.9 ± 4.3
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4.7 ± 3.6
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No. embryo transfer
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2.8 ± 0.4
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2.7 ± 0.4
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2.4 ± 0.9
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NS
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rFSH dosage (ampoules)
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26.6 ± 6.8
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31.4 ± 8.0
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30.8 ± 10.4
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NS
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Note: Values are means ± SD. NS = not significant.
a For the three groups (Kruskal-Wallis test).
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Gruber et al. Journal of Experimental & Clinical Assisted Reproduction 2007 4:1 doi:10.1186/1743-1050-4-1
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Table 2
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Luteal phase characteristics of E2, P and the E2/P ratio of clinical pregnancies, preclinical abortions and non-pregnant cycles.
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Clinical pregnancies
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Preclinical abortions
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Not pregnant
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P valuea
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E2 on OI +4 days(pg/mL)
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925.4 ± 634.8
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792.0 ± 586.4
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812.1 ± 794.5
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NS
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P on OI +4 days (ng/mL)
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54.0 ± 24.9
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68.6 ± 60.5
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56.7 ± 34.4
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NS
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E2/P Ratio on OI +4 days
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18.2 ± 11.5
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10.3 ± 8.5
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11.8 ± 10.0
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0.010
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E2 on OI +5 days (pg/mL)
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1612.5 ± 1118.9
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1210.4 ± 576.6
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1257.4 ± 905.2
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NS
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P on OI +5 days (ng/mL)
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101.4 ± 52.6
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131.5 ± 66.6
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110.6 ± 56.3
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NS
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E2/P Ratio on OI +5 days
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18.1 ± 11.3
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9.3 ± 6.3
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8.7 ± 7.9
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0.005
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E2 on OI +7 days (pg/mL)
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2416 ± 787.9
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2456.5 ± 854.9
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2032.0 ± 837.4
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NS
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P on OI +7 days (ng/mL)
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170.9 ± 57.2
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187.0 ± 28.2
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198.5 ± 118.4
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NS
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E2/P Ratio on OI +7 days
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15.4 ± 6.2
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6.5 ± 7.6
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5.8 ± 10.7
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Note: Values are means ± SD. NS = not significant. OI = ovulation induction.
a = For the three groups (Kruskal-Wallis test).
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Gruber et al. Journal of Experimental & Clinical Assisted Reproduction 2007 4:1 doi:10.1186/1743-1050-4-1
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