What is Hypothyroidism During Pregnancy?
Hypothyroidism happens when the thyroid gland does not produce enough hormones to meet the body’s needs. During pregnancy, these hormones play an important role in your baby’s growth—especially brain development.
Because many symptoms are similar to normal pregnancy changes, this condition can sometimes go unnoticed without testing.
Possible causes and risk factors:
- A thyroid gland that is not working properly
- History of thyroid or autoimmune conditions
- Hormonal changes during pregnancy
- Low iodine levels in the diet
When untreated, hypothyroidism may increase the risk of miscarriage, delivery complications, and bleeding after birth.
Symptoms
Hypothyroidism can develop slowly, and symptoms may be easy to miss during pregnancy.
Common symptoms include:
- Ongoing fatigue
- Feeling unusually sensitive to cold
- Weight gain beyond expected pregnancy changes
- Dry skin or thinning hair
- Constipation
- Muscle aches or weakness
- Slower thinking or trouble focusing
- Swelling in the face or hands
How is it diagnosed?
Diagnosis is done through a simple blood test. Your provider checks thyroid-stimulating hormone (TSH) and thyroid hormone (T4) levels.
Routine screening is not always needed for everyone. However, testing is recommended if you have symptoms, a history of thyroid disease, or certain risk factors.
How is it treated?
Treatment focuses on restoring normal hormone levels to support both you and your baby.
Most patients are treated with a daily thyroid hormone medication. This medication is safe during pregnancy and helps maintain healthy development.
Your provider will:
- Adjust your medication dose as needed
- Monitor your hormone levels regularly
- Recommend taking medication separately from prenatal vitamins for best absorption
With proper treatment, most people have healthy pregnancies and deliveries.
