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Table 1 Demographic and pretreatment characteristics

From: Endometrial thickness affects the outcome of in vitro fertilization and embryo transfer in normal responders after GnRH antagonist administration

  Group 1 Group 2 Group 3 Group 4
N = 29 N = 162 N = 1852 N = 63
Mean age 33.12 ± 3.46 32.34 ± 4.02 31.89 ± 3.67 31.98 ± 4.16
No. of Previous IVF attempts   
None 15(51.72%)* 124(76.54%) 1390(75.05%) 51(80.95%)
One 10(34.48%) 30(18.51%) 374(20.19%) 11(17.46%)
Two or more 4(13.79%) 8(4.94%) 87(4.70%) 1(1.75%)
Baseline FSH(U) 7.84 ± 2.44 8.13 ± 2.12 8.87 ± 5.28 8.89
Baseline E2 (pmol/L) 167.71 ± 90.66 184.48 ± 160.48 169.85 ± 253.51 132.88 ± 57.19
  1. *P < 0.05.