The Home Observation of Periconceptional Exposures (HOPE) study, a prospective cohort: aims, design, recruitment and compliance

Table 4 Urine collection completion relative to estimated day of ovulation with or without conception (EDO/C)

	EDO/C-3^a	EDO/C-2^a	EDO/C-1^a	EDO/C	EDO/C + 1	EDO/C + 2	EDO/C + 3
All Cycles
Female	124/185 (67.0)	175/234 (74.8)	216/262 (82.4)	239/276 (86.6)	249/276 (90.2)	258/276 (93.5)	257/276 (93.1)
Male	103/185 (55.7)	146/234 (62.4)	191/262 (72.9)	208/276 (75.4)	207/276 (75.0)	164/276 (59.4)	72/276 (26.1)^b
Conception Cycles
Female	37/53 (69.8)	51/65 (78.5)	62/73 (84.9)	64/74 (86.5)	66/74 (89.2)	70/74 (94.6)	65/74 (87.8)
Male	32/53 (60.4)	42/65 (64.6)	52/73 (71.2)	58/74 (78.4)	55/74 (74.3)	48/74 (64.9)	23/74 (31.1)^b

^aDenominator varies due to timing of enrollment and timing of the start of the fertile window. In some cases the first day of highly fertile cervical fluid occurred fewer than three days prior to the EDO/C and in some cases enrollment occurred fewer than three days prior to the EDO/C
^bMales were instructed to discontinue collecting at Peak + 2 so specimens collected on Peak + 3 were extra

ISSN: 1476-069X