Table 3.

Frequency distribution of retrospectively-measured time-to-pregnancy conditional on prospectively-measured time-to-pregnancy in 421 women: The Snart-Gravid Study, Denmark, 2007–2012.

	Prospectively-measured time-to-pregnancy, months
		1	2	3	4	5	6	7	8	9	10	11	12	>12	Total
Retrospectively-measured time-to-pregnancy, months	1	106	28	2	2	1	0	0	0	0	0	0	0	0	139
	2	29	37	14	2	1	2	1	0	0	0	0	0	0	86
	3	1	18	30	19	5	3	0	0	1	0	0	0	0	77
	4	0	0	10	16	6	6	0	1	0	1	0	0	0	40
	5	0	0	4	3	14	6	1	0	0	0	0	0	0	28
	6	0	0	1	3	5	9	1	1	1	0	0	0	0	21
	7	0	0	0	0	1	3	4	2	0	0	0	0	0	10
	8	0	0	0	0	0	1	2	3	1	0	1	0	0	8
	9	0	0	0	0	0	0	1	1	1	0	0	0	0	3
	10	0	0	0	0	0	0	0	0	0	2	5	0	0	7
	11	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	12	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	>12	0	0	0	1	0	0	0	0	0	1	0	0	0	2
	Total	136	83	61	45	33	30	10	8	4	3	6	0	0	421