Table 3. Fertility metrics as a function of the number of cycles of attempted conception for example 2.

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	0.050	0.264	0.539	0.285	0.856	0.000
1	0.070	0.218	0.467	0.239	0.812	0.285
3	0.116	0.157	0.365	0.177	0.724	0.567
6	0.192	0.103	0.270	0.121	0.601	0.740
12	0.348	0.046	0.169	0.065	0.407	0.856
18	0.482	0.010	0.116	0.039	0.277	0.896
24	0.587	0.000	0.083	0.025	0.193	0.915
36	0.728	0.000	0.046	0.012	0.101	0.931

In example 2, 5% of couples are assumed to have a zero probability of conceiving. The remaining 95% are assumed to have intrinsic conception rates described by a beta distribution, with α = 1.8 and β = 4.2. This population is systematically less fertile than that in example 1.