Hunault et al reported 2 models for predicting spontaneous pregnancy leading to live births for a subfertile couple. These are based on 3 previous studies. The authors are from Erasmus Medical Center, McMaster University and University Medical Center Utrecht.
Patient selection: woman from 21 to 41 years of age
Models incorporated: Eimers, Collins, Snick
Parameters:
(1) woman's age in years
(2) duration of subfertility in years
(3) type of subfertility
(4) sperm motility in percent
(5) referral status
Parameter
Finding
Points
woman's age
21 to 25 years
0
26 to 31 years
3
32 to 35 years
7
36 or 37 years
10
38 or 39 years
13
40 to 41 years
15
duration of subfertility
1 year
0
2 years
3
3 or 4 years
7
5 or 6 years
12
7 or 8 years
18
type of subfertility
primary
8
secondary
0
motility in percent
>= 60%
0
40 to 59%
2
20 to 39%
4
< 20%
6
referral status
secondary care
0
tertiary care
4
total score =
= SUM(points for all 5 parameters)
Interpretation:
• minimum score: 0
• maximum score: 51
• The higher the score the lower the chances of spontaneous pregnancy.
