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Table 1 Baseline characteristics

From: Total fertilization failure and idiopathic subfertility

  IVF after unsuccessful IUI (n = 45) IVF immediately (n = 58) p-value
Female age in years 33.3 (3.9) 32.6 (3.7) 0.32
Duration of subfertility in years 5.2 (2.0) 4.7 (2.0) 0.22
Primary subfertility (%) 33 (73%) 45 (78%) 0.62
Secondary subfertility (%) 12 (27%) 13 (22%)  
  1. Values are mean ± standard deviation (SD) unless indicated otherwise
  2. IVF = in vitro fertilization, IUI = intrauterine insemination