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

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