Could it be my thyroid? The most common cause of postpartum thyroid dysfunction is postpartum thyroiditis, which affects up to 17% of women. Postpartum thyroiditis is defined as abnormal thyroid function within the first 12 months postpartum, in the absence of Graves’ disease or abnormal thyroid function before pregnancy.  Clinical symptoms of postpartum thyroiditis vary. Whether the presenting symptoms mimic postpartum depression, hypothyroidism, hyperthyroidism or Graves’ disease, a thorough assessment is required to differentiate these conditions. Postpartum thyroid dysfunction can be managed well when evaluated/diagnosed and treated by a highly trained thyroid medical professional. If you are looking for more information regarding postpartum thyroid dysfunction, the Thyroid Virtual Clinic offers a safe, effective and convenient way to answer questions about these conditions from the comfort of your own home or workplace.