Calculate the probability of a spontaneous ongoing pregnancy within 1 year
(leading to live birth).

This probability is not reliable in case of :

• -Women with ovulation dysorders
• -Men with severe male factor (Total motile sperm count = volume x concentration x % motility < 3 milion)
• -Women with 2-sided tubal pathology.
• -Less than 1 year duration of infertility
• -Womans age above 38

Has a postcoital test been performed? No Yes

Female age	20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Year 0 1 2 3 4 5 6 7 8 9 10 11 Month
Duration of subfertility in years	1 2 3 4 5 6 7 8 9 Year 0 1 2 3 4 5 6 7 8 9 10 11 Month
Previous pregnancies (in current or other partnerships)?	No Yes
Referred by:	General Practitioner or on own initiative Gynecology or other specialty
Percentage progressive motile sperm?	10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

This model has been validated between 2002-2004 in 38 hospitals in the Netherlands by Van der Steeg et al. In the Colaborative Effort of Clinical Evaluation in Reproductive Medicine (CECERM). The models showed to predict accurately.