Table 3.

Estimated ovulation day based on positive luteinizing hormone test (N=18,761 cycles).

Estimated day of ovulation	Cycles, n (%)
11	1668 (8.89)
12	1877 (10.00)
13	2248 (11.98)
14	2509 (13.37)
15	2267 (12.08)
16	1905 (10.15)
17	1518 (8.09)
18	1154 (6.15)
19	822 (4.38)
20	636 (3.39)
21	458 (2.44)
22	321 (1.71)
23	304 (1.62)
24	266 (1.41)
25	189 (1.00)
26	184 (0.98)
27	149 (0.79)
28	160 (0.85)
29	126 (0.67)