Figure 2.

Participant Flow Chart for the EARTH Study. BQ, Baseline Questionnaire; FQ, Full Questionnaire (includes the Food Frequency Questionnaire). Biochemical pregnancy loss is defined as the demise of a β-hCG-confirmed pregnancy that was never visualized on ultrasound. Clinical pregnancy loss is defined as the demise of an ultrasound confirmed intrauterine pregnancy up to 20 weeks gestation. IVF cycles include fresh and frozen IVF-based protocols. IUI cycles include all non-IVF based procedures such as IUI, ovulation induction and ovarian stimulation. Non-medically assisted cycles are those that were conceived naturally without treatment.