Thyroid health is particularly important during pregnancy because thyroid hormones play a role in the baby’s growth and development. Both low and high thyroid hormone levels can affect pregnancy, which is why timely diagnosis, regular monitoring and appropriate treatment are important.
In this article, Dr. Archana Kankal, explains thyroid disorders during pregnancy, how hypothyroidism and hyperthyroidism can affect the mother and baby, and why regular thyroid testing is necessary.
What Is Thyroid Disease During Pregnancy?
The thyroid gland produces hormones that regulate several important functions in the body. During pregnancy, the body’s requirement for thyroid hormones changes to support both maternal health and the developing baby.
Thyroid disorders during pregnancy can broadly present in two forms:
- Hypothyroidism – when the body does not produce enough thyroid hormone
- Hyperthyroidism – when the body has excessive thyroid hormone activity
Both conditions require appropriate medical evaluation and monitoring during pregnancy.
What Is Hypothyroidism in Pregnancy?
Hypothyroidism occurs when the mother’s body does not produce enough thyroid hormone to meet the increased requirements during pregnancy.
Adequate thyroid hormone levels are particularly important for the baby’s development. This is why women diagnosed with hypothyroidism need regular monitoring throughout pregnancy.
How Can Hypothyroidism Affect the Baby?
According to Dr. Kankal, inadequate thyroid hormone levels during pregnancy may affect the baby’s development, particularly brain development.
If hypothyroidism is not appropriately managed, it may potentially be associated with developmental concerns in the child.
The important point is that hypothyroidism can be identified through blood tests and managed with appropriate thyroid hormone replacement under medical supervision.
How Often Should Thyroid Levels Be Checked During Pregnancy?
If hypothyroidism has been detected during pregnancy, thyroid hormone levels may need to be monitored approximately every four to six weeks, depending on the individual case and the doctor’s recommendation.
Regular testing helps the doctor determine whether the current medication dose is appropriate or needs to be adjusted.
The exact frequency of testing can vary, so follow the schedule recommended by your gynecologist or treating physician.
What If You Were Taking Thyroid Medicine Before Pregnancy?
Women who were already taking thyroxine or another prescribed thyroid hormone replacement before becoming pregnant should inform their doctor as soon as pregnancy is confirmed.
According to Dr. Kankal, the thyroid hormone requirement may increase during pregnancy. Therefore, the dose may need to be increased under medical supervision.
Do not increase, decrease or stop thyroid medication on your own. Any dose adjustment should be made after consulting your doctor and reviewing your thyroid test results.
What Is Hyperthyroidism During Pregnancy?
Hyperthyroidism occurs when there is excessive thyroid hormone activity in the mother’s body.
Just like hypothyroidism, uncontrolled hyperthyroidism can affect pregnancy and the baby’s development and therefore requires medical attention.
How Can Hyperthyroidism Affect Pregnancy?
According to the doctor, hyperthyroidism during pregnancy may be associated with complications such as:
- Miscarriage
- Preeclampsia or high blood pressure during pregnancy
- Restricted fetal growth
- Concerns related to the baby’s development
Appropriate medication may be recommended when necessary. The type and dose of treatment should be determined by the treating doctor based on the mother’s thyroid levels and overall pregnancy.
Why Is Regular Thyroid Monitoring Important During Pregnancy?
Thyroid hormone requirements can change as pregnancy progresses. A medication dose that was appropriate before pregnancy may not necessarily remain appropriate throughout all stages of pregnancy.
Regular thyroid testing allows your healthcare team to:
- Monitor thyroid hormone levels
- Assess whether treatment is working
- Adjust medication when required
- Reduce the risk of complications associated with poorly controlled thyroid disease
- Support the mother’s health and the baby’s development
This is why women with a known thyroid condition should continue regular follow-ups throughout pregnancy.
Can Thyroid Problems in Pregnancy Be Managed?
Yes. Thyroid disorders during pregnancy can generally be managed with regular monitoring and appropriate treatment.
If you already have a thyroid condition, inform your obstetrician about your diagnosis and current medications. If abnormal thyroid levels are detected for the first time during pregnancy, your doctor can recommend further evaluation and treatment based on the results.
The key is to avoid self-medication or changing the dosage of thyroid medicines without medical advice.
When Should You Speak to Your Doctor?
Consult your doctor if:
- You have a history of thyroid disease and are planning pregnancy
- You are already taking thyroid medication and become pregnant
- Your thyroid tests are abnormal during pregnancy
- Your doctor has advised repeat thyroid testing
- You have concerns regarding your medication or dosage
Women with an existing thyroid disorder should continue the monitoring schedule recommended by their healthcare provider.
Conclusion
Both hypothyroidism and hyperthyroidism during pregnancy require appropriate monitoring and management. Thyroid hormones are important for the baby’s growth and development, and uncontrolled thyroid disorders may increase the risk of pregnancy complications.
Regular thyroid tests and timely medication adjustments can help keep thyroid levels appropriately controlled throughout pregnancy. If you are already taking thyroid medication, do not change your dose without consulting your doctor.
