Table 8. Fertility metrics as a function of the number of cycles of attempted conception for example 5, at a female age of 30.

Number of cycles elapsed	Proportion of remaining population who are sterile	Median intrinsic conception rate in remaining population	90th percentile of intrinsic conception rate in remaining population	Probability of conceiving in next cycle	Probability of conceiving in next 12 cycles	Cumulative probability of conception
0	0.02	0.195	0.367	0.209	0.839	0
1	0.026	0.178	0.341	0.191	0.814	0.209
3	0.04	0.151	0.297	0.163	0.763	0.473
6	0.068	0.119	0.246	0.13	0.685	0.677
9	0.105	0.096	0.208	0.105	0.607	0.781
12	0.149	0.077	0.179	0.086	0.532	0.839
18	0.259	0.048	0.134	0.058	0.398	0.898
24	0.379	0.024	0.102	0.039	0.29	0.925
36	0.606	0	0.059	0.018	0.148	0.947

In example 5, couples are assumed to have peak intrinsic conception rates drawn from a beta distribution with α = 3 and β = 10; the distribution of female ages at which couples become sterile is as given in [24], Table 2; a couple's intrinsic conception rate declines linearly for 12.5 years prior to sterility.