Fig 1.
Flowchart of the process, from patient enrollment to data analysis.
Fig 2.
Information materials distributed to women before and after enrollment.
Table 1.
The eight sections of the Pregnancy Exposures Questionnaire.
Table 2.
Minimum detectable effect size expressed as odds ratio (OR) and absolute difference of proportions according to exposure prevalence (power = 80%; type 1 error: 5%).