All patients with postpartum depression should be screened for thyroid dysfunction, as postpartum thyroiditis is often missed and misdiagnosed, according to Christine Kessler, CNS, ANP.
Postpartum thyroiditis (PPT) is “an inflammatory, autoimmune thyroid condition,” Ms. Kessler said at the Metabolic & Endocrine Disease Summit by Global Academy for Medical Education. This dysfunction can involve high or low thyroid-stimulating hormone and may occur during the first postpartum year in women who were euthyroid prior to pregnancy. Women with PPT will be thyroid peroxidase (TPO) antibody positive. Postpartum thyroiditis also can occur after a miscarriage.
PPT can occur when the immune system rebounds after pregnancy following immune suppression during pregnancy. “Autoimmune destruction of the thyroid gland leads to initial release of stored thyroid hormone,” Ms. Kessler said. Notably, “patients with a predisposition for Hashimoto’s will have an attack on the thyroid gland. Don’t miss this in your patients.”
PPT is the most common endocrine disease in premenopausal women, with an incidence of 8%-14% in the United States, noted Ms. Kessler, a nurse practitioner in private practice in Virginia. However, the symptoms are often attributed to anxiety, depression, or the stress of new motherhood.
Women with PPT have positive thyroid peroxidase antibodies, said Ms. Kessler, and the higher the antibody, the higher the risk for PPT. Other risk factors include the presence of autoimmune disorders prior to pregnancy, a patient or family history of thyroid dysfunction, and a history of PPT.
Roughly one-third of women with PPT present with hyperthyroidism alone, another third present with hypothyroidism alone, and another third have the classic presentation of PPT, which starts with a transient hyperthyroid phase that usually occurs 1-4 months post partum, followed by a hypothyroid phase and euthyroid phase that is usually achieved within the first 12-18 months post partum, she said.
Patients presenting with PPT in the hyperthyroid phase display symptoms including insomnia, anxiety, irritability, heat intolerance, fatigue, and palpitations, Ms. Kessler said. These women “are often told they have postpartum depression; they aren’t sleeping well, and they feel like they are failing as a mom.”
Patients in the hypothyroid phase may present with fatigue, depression, cold intolerance, dry skin, impaired concentration, and paresthesias, she noted.
Treatment for PPT depends on the stage patients are in when they present. For patients in the hyperthyroid phase, Ms. Kessler recommended beta-blockers for relief of symptoms including tremor and palpitations, but these should be tapered as symptoms decrease. “There is no need for antithyroid drugs for women in the hyperthyroid phase.”
For patients presenting in the hypothyroid phase, Ms. Kessler recommended levothyroxine for 6-12 months if needed, but the drug should be tapered and discontinued after PPT, as about 80% of patients will become euthyroid. However, approximately 50% of women with PPT will develop hypothyroidism in 2-10 years, so ongoing follow-up is essential for these patients.
Ms. Kessler disclosed serving as an adviser/speaker for Novo Nordisk, serving as a speaker for Salix and Acella, and serving as National Study Chair of probiotic use with antibiotics for Clarion Brand. Global Academy and this news organization are owned by the same parent company.