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Table 1 Reasons for initial ineligibility by sexa

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

Reason for ineligibility

Male

(n = 76)

n (%)

Female

(n = 267)

n (%)

Age

4 (5.3)

14 (5.2)

>1 h drive from Salt Lake City

1 (1.3)

0

Unable to respond to questionnaires in English

0

0

Not planning to conceive within 3 monthsc

3 (3.9)

32 (12.0)

Medroxy-progesterone acetate injection in last 12 months

NA

14 (5.2)

Implantable contraceptivebc

NA

34 (12.7)

Fewer than 9 menstrual flows in the past yearc

NA

29 (10.9)

Unable to conceive after a year of regular, unprotected intercourse

6 (7.9)

54 (20.2)

Previous infertility or subfertility diagnosis

2 (2.6)

32 (12.0)

Continuous or indistinguishable cervical mucus patterns in previous charting

NA

10 (3.8)

Separated from partner

1 (1.3)

1 (0.4)

Screening incomplete

3 (3.9)

1 (0.4)

Partner ineligible

56 (73.7)

8 (3.0)

Already pregnant

NA

38 (14.2)

  1. Abbreviations: NA (not applicable)
  2. aEligibility assessed by online screening questionnaire
  3. bImplanon® or intrauterine device
  4. cIn these cases, individuals may have been contacted later to reassess eligibility