How does an underactive thyroid affect pregnancy?
Elijah King
Updated on March 03, 2026
How does an underactive thyroid affect pregnancy?
Pregnant women with uncontrolled hypothyroidism can get high blood pressure, anemia (low red blood cell count), and muscle pain and weakness. There is also an increased risk of miscarriage, premature birth (before 37 weeks of pregnancy), or even stillbirth.
Can you still have a baby with underactive thyroid?
An undiagnosed thyroid condition can make it difficult to conceive. It can also cause problems during pregnancy itself. Once the over- or underactive thyroid is under control, however, there is no reason why you should not have a successful pregnancy and a healthy baby.
What foods should I avoid if I have hypothyroidism during pregnancy?
Nuts: Almonds, cashew, peanuts, flax seeds, walnuts, and pine nuts should be avoided as they may have thyroid inhibiting compounds.
- 10 Key Pointers for Hypothyroidism during Pregnancy.
- Avoid feasting out regularly.
- Avoid soy in any form.
- You will need more iodine when you are pregnant.
- Do not miss out on antioxidants.
What happens if you don’t take levothyroxine while pregnant?
Women who don’t receive enough thyroid hormone during pregnancy are at greater risk of complications, including miscarriage, preeclampsia, and preterm delivery. Some studies show that children whose mothers didn’t have enough thyroid hormone during pregnancy may have lower IQs.
How serious is underactive thyroid?
If an underactive thyroid is not treated, it can lead to complications, including heart disease, goitre, pregnancy problems and a life-threatening condition called myxoedema coma (although this is very rare).
Can an underactive thyroid cause a miscarriage?
If you’ve been diagnosed with hypothyroidism — or an underactive thyroid — you may be wondering if it may cause problems during pregnancy or even a miscarriage. In fact, hypothyroidism is linked to miscarriages so it’s important to be able to recognize the signs of this condition.
Can an underactive thyroid cause miscarriage?
What happens if you have thyroid during pregnancy?
The thyroid makes hormones that help your body work. If it makes too little or too much of these hormones, you may have problems during pregnancy. Untreated thyroid conditions during pregnancy are linked to serious problems, including premature birth, miscarriage and stillbirth.
How can I get rid of my thyroid during pregnancy?
For women who require treatment for hyperthyroidism, an antithyroid medication that blocks production of thyroid hormones is used. This medication—propylthiouracil (PTU)—is usually given during the first trimester, and — if necessary, methimazole can be used, after the first trimester.
How often should thyroid be checked during pregnancy?
Thyroid hormone levels need to be checked every 4 weeks during the first half of pregnancy. The treatment is safe and essential to both mother and fetus.
Does levothyroxine cause birth defects?
Levothyroxine Pregnancy Warnings There is a long history of using this drug in pregnant women and this experience has not shown increased rates of fetal malformations, miscarriages or other adverse maternal or fetal outcomes.
How can I control my thyroid during pregnancy?
Most thyroid specialists recommend taking two extra doses of thyroid medicine per week, starting right away. Contact your doctor as soon as you know you’re pregnant. Your doctor will most likely test your thyroid hormone levels every 4 to 6 weeks for the first half of your pregnancy, and at least once after 30 weeks.
How does an underactive thyroid affect fertility?
There is sometimes a link between hypothyroidism — when you have an underactive thyroid gland — and infertility in women. With hypothyroidism, your thyroid gland doesn’t produce enough of certain important hormones. Low levels of thyroid hormone can interfere with the release of an egg from your ovary (ovulation), which impairs fertility.
Is under active thyroid dangerous during pregnancy?
Under active thyroid can be very dangerous, especially if you are with child. It is very likely to affect pregnant women who are above thirty or have a history of thyroid problems. Hypothyroidism can lead to fatal complications during your pregnancy. It can affect you as well as the growing fetus as early as in the first trimester.
Can I get pregnant with overactive thyroid?
If your hormones are in balance and you are ovulating regularly, there should be no reason that you should not be able to become pregnant simply because of an overactive thyroid.
What causes a thyroid gland to become underactive?
An underactive thyroid (hypothyroidism) is when your thyroid gland does not produce enough of the hormone thyroxine (also called T4). Most cases of an underactive thyroid are caused by the immune system attacking the thyroid gland and damaging it, or by damage that occurs as a result of treatments for thyroid cancer or an overactive thyroid.