Thyroid Function and Pregnancy: Key Considerations for Women - Obstetrics and Gynecology

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Thyroid Function and Pregnancy


Hello, doctor.
I have a few questions: Thank you for your help.
About three years ago, I underwent thyroid surgery, and I have approximately 3/4 of my left thyroid remaining and a small portion of my right thyroid.
I have been taking Eltroxin 50mg daily, and my blood tests are within normal ranges.
I have read that hypothyroidism can affect both maternal and fetal health.

1.
If my medication is stable, is it suitable for me to get married and conceive? If not, I do not plan to get married or have children.
Thank you.

2.
Having undergone thyroid surgery and developed hypothyroidism, will this affect fetal health? How does it compare to individuals without a history of thyroid surgery regarding fetal health?
3.
Previously, when taking Eltroxin, my doctor only mentioned taking it on an empty stomach, and I did not ask about the timing.
Therefore, I usually eat food about 15 minutes after taking the medication.
Should I wait 30 minutes to 1 hour before eating? I have been doing it this way for three years...
Thank you, doctor!

Tiāntiān, 30~39 year old female. Ask Date: 2020/04/30

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, taking medication is fine during pregnancy, but the dosage may need to be adjusted.
As for the method of administration, you should consult your internist.
Wishing you good health.

Reply Date: 2020/04/30

More Info


Thyroid function plays a crucial role during pregnancy, and understanding its implications is vital for the health of both the mother and the developing fetus. Given your history of thyroid surgery and current medication regimen, it's important to address your concerns regarding pregnancy and thyroid health.

1. Suitability for Marriage and Pregnancy: If your thyroid function tests are within normal limits while on medication (in your case, taking 50 mg of Levothyroxine), it is generally considered safe to pursue marriage and pregnancy. However, it is essential to have regular follow-ups with your healthcare provider to monitor your thyroid levels, especially during pregnancy, as the demand for thyroid hormones increases. If your thyroid levels remain stable and you are asymptomatic, there should be no reason to delay marriage or pregnancy.

2. Impact on Fetal Health: Women with a history of hypothyroidism, especially those who have undergone thyroid surgery, need to be vigilant during pregnancy. Hypothyroidism can lead to complications such as preeclampsia, anemia, and placental abruption. Moreover, untreated hypothyroidism during pregnancy can affect fetal development, potentially leading to intellectual disabilities and developmental delays. However, if your thyroid levels are well-managed with medication, the risks to fetal health can be minimized. Compared to women without a history of thyroid issues, those with hypothyroidism may have a slightly higher risk of complications, but this can be effectively managed with proper medical care.

3. Medication Timing: The timing of your Levothyroxine intake is crucial for its effectiveness. It is generally recommended to take Levothyroxine on an empty stomach, ideally 30 to 60 minutes before breakfast. This allows for optimal absorption of the medication. Taking it too soon after eating can reduce its effectiveness, which may lead to fluctuations in thyroid hormone levels. If you have been taking your medication 15 minutes before eating for three years, it may be beneficial to adjust this routine to ensure you are getting the full benefit of the medication. Consider setting a reminder to take your medication first thing in the morning and wait at least 30 to 60 minutes before consuming food.

In summary, with proper management of your thyroid condition, it is generally safe to pursue marriage and pregnancy. Regular monitoring of your thyroid levels during pregnancy is essential to ensure both your health and that of your baby. Always consult with your healthcare provider for personalized advice and adjustments to your treatment plan. They can provide you with the most accurate information based on your specific health status and needs.

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