Post-authorization Safety Study in North America to Monitor Pregnancy and Infant Outcomes Following Administration of Dupilumab During Planned or Unexpected Pregnancy

Key Inclusion Criteria: Cohort 1: Dupilumab-Exposed Cohort * Pregnant women * Exposure to dupilumab for the treatment of the approved indications of atopic dermatitis (AD) or asthma, for any number of days, at any dose, and at any time from the first day of the LMP up to and including the end of pregnancy. Cohort 2: Disease-Matched Comparison Cohort (Comparison Group 1) * Pregnant women * Diagnosed with a dupilumab-approved indications of moderate-to-severe AD without asthma or moderate-to-severe asthma; frequency matched to the exposed group by disease indication, with the indication and severity validated by medical records when possible. * No exposure to dupilumab any time in the current pregnancy or within 10 weeks of the first day of the LMP and may or may not have taken another medication for their disease in the current pregnancy. Cohort 3: Healthy Comparison Cohort (Comparison Group 2): * Pregnant women Key Exclusion Criteria: Cohort 1: Dupilumab-Exposed Cohort * Women who have first contact with the project after prenatal diagnosis of any major structural defect * Women who have used dupilumab for an indication other than asthma or AD Cohort 2: Disease-Matched Comparison Cohort (Comparison Group 1): * Women who have first contact with the project after prenatal diagnosis of any major structural defect * Exposure to dupilumab within 10 weeks of LMP or anytime during the current pregnancy Cohort 3: Non-Diseased Comparison Cohort (Comparison Group 2): * Exp…