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Table 5 Estimated odds ratio by female age regarding the occurrence of a clinical pregnancy.

From: Impact of GnRH ovarian stimulation protocols on intracytoplasmic sperm injection outcomes

Female age (years) OR CI 95%
25 (a) 1  
26 1.138 0.973 – 1.331
27 1.272 0.940 – 1.719
28 1.391 0.901 – 2.147
29 1.485 0.855 – 2.579
30 1.542 0.802 – 2.967
31 1.554 0.743 – 3.252
32 1.514 0.678 – 3.384
33 1.422 0.607 – 3.330
34 1.283 0.533 – 3.092
35 1.108 0.454 – 2.708
36 0.914 0.372 – 2.242
37 0.716 0.290 – 1.767
38 0.532 0.210 – 1.344
39 0.373 0.138 – 1.003
40 0.246 0.081 – 0.747
41 0.152 0.041 – 0.562
42 0.087 0.018 – 0.427
43 0.047 0.007 – 0.326
44 0.023 0.002 – 0.249
  1. (a) Reference category.