A Multicenter, Postmarketing Study Evaluating the Concentration of Cimzia® in Mature Breast Milk of Lactating Mothers

The study will only include women who are receiving treatment with Certolizumab Pegol (CZP) for an approved indication in accordance with their treating physician, although this study is non-interventional regarding treatment with CZP, it is considered interventional due to the collection of breast milk from the lactating mothers.