Overview
Thyroid disease in pregnancy encompasses both hypothyroidism and hyperthyroidism, impacting maternal health and fetal development. Proper management is crucial to prevent adverse outcomes such as preterm birth, preeclampsia, and neurodevelopmental issues in the offspring 12.Diagnosis
Thyroid Function Tests: Measure TSH, free T4, and sometimes free T3 levels 12.
Autoantibody Testing: Evaluate for TPOAb and TGAb to differentiate autoimmune causes 12.
Ultrasound Monitoring: Assess fetal growth and development, especially in cases of hypothyroidism 1.Management
Hypothyroidism: Initiate levothyroxine replacement therapy, aiming for TSH levels within the trimester-specific reference range 1.
Hyperthyroidism: Consider methimazole or propylthiouracil, adjusting doses based on TSH and free T4 levels 1.
Monitoring: Regular follow-up with thyroid function tests to adjust medication as needed 1.Special Populations
Pregnancy: Tailor treatment closely, adjusting levothyroxine doses as pregnancy progresses to maintain optimal maternal and fetal outcomes 1.
Comorbidities: Manage thyroid disease alongside other conditions, ensuring no drug interactions and optimal control 1.Key Recommendations
Regular Monitoring of Thyroid Function: Perform frequent thyroid function tests throughout pregnancy to adjust treatment as needed (Evidence: Moderate) 1.
Levothyroxine Dosing Adjustment: Modify levothyroxine doses based on trimester-specific TSH reference ranges to prevent maternal and fetal complications (Evidence: Moderate) 1.
Consider Genetic Counseling: Given the variability in practice patterns and ethical considerations, consider referring patients for genetic counseling when discussing prenatal testing options (Evidence: Expert opinion) 12.References
1 Farrell RM, Agatisa PK, Mercer MB, Mitchum AG, Coleridge MB. The use of noninvasive prenatal testing in obstetric care: educational resources, practice patterns, and barriers reported by a national sample of clinicians. Prenatal diagnosis 2016. link
2 van den Heuvel A, Chitty L, Dormandy E, Newson A, Deans Z, Marteau TM. Informed choice in prenatal testing: a survey among obstetricians and gynaecologists in Europe and Asia. Prenatal diagnosis 2008. link