Thyroid Problems During Pregnancy: What to Watch For

Here’s a number that might surprise you: according to data from Indian health bodies, as many as 1 in 10 pregnant women in India may have an underactive thyroid. Many don't even know it.

Your thyroid, a small butterfly-shaped gland in your neck, works overtime during pregnancy (garbhavastha). It produces hormones that are not just for you, but are essential for your baby's brain and nervous system development, especially in the first trimester. Think of it as a critical building block for your growing baby (bachcha).

When this gland isn't working properly, it can cause problems. But the good news? These issues are very manageable with the right medical attention. The key is knowing what to look for.

Why Pregnancy Changes Your Thyroid Function

So, why does pregnancy put your thyroid in the spotlight? Two main pregnancy hormones are the cause: hCG (the one that gives you a positive pregnancy test) and estrogen. The hCG hormone can mildly stimulate the thyroid, and rising estrogen levels increase the amount of thyroid-binding proteins in your blood. This is a complex way of saying your body's demand for thyroid hormones shoots up by nearly 50%.

For most women, the thyroid gland simply adapts and produces more. But if you have an underlying, even mild, thyroid issue, this increased demand can unmask the problem. It's like a stress test for your thyroid gland.

Underactive Thyroid (Hypothyroidism): The Silent Problem

This is the most common thyroid issue seen in pregnancy. Hypothyroidism is when your thyroid gland doesn't produce enough hormones. The trouble is, its symptoms are notoriously similar to normal pregnancy symptoms, making them easy to dismiss.

Take the case of a 32-year-old software engineer from Gurgaon. She felt a level of fatigue (thakaan) so deep that she could barely get through her workday. She blamed her long commute and the pregnancy itself. Her family told her it was normal to be tired. It was only when she mentioned feeling constantly cold during the hot Delhi summer and noticing her face looked unusually puffy that her doctor suggested a thyroid test. The result confirmed hypothyroidism.

Many women just think, "I'm pregnant, of course I'm tired and gaining weight." But sometimes, it's more than that. Watch for symptoms that feel excessive or out of place:

It's the degree of these symptoms that matters. A little tiredness is normal; bone-crushing fatigue that doesn't improve with rest is a red flag.

• Extreme tiredness that feels overwhelming
• Feeling very cold when others are comfortable
• Significant constipation or what some call "gas trouble"
• Difficulty concentrating or a feeling of 'brain fog'
• Dry skin and a puffy face
• More weight gain than your doctor expects

Overactive Thyroid (Hyperthyroidism): When Everything Speeds Up

Experiencing this? Dr Aparna Khandelia (MBBS, MS (Obstetrics & Gynaecology)) treats IVF treatment, normal and cesarean deliveries, high-risk pregnancy management, prenatal and postnatal care, family planning counseling, irregular periods and PCOS treatment, pregnancy ultrasounds at ERA's Lucknow Medical College & Hospital and B Hope Hospital in Lucknow. Book an appointment.

Less common during pregnancy, but still important, is hyperthyroidism. This is when your thyroid gland produces too much hormone, putting your body into overdrive. A very mild form can actually be normal in the first trimester because of those hCG hormones we talked about, and it often resolves on its own.

However, if the symptoms are severe or persist, it needs medical evaluation. Your body feels like it's running a marathon even when you're sitting still. The signs are often the opposite of hypothyroidism.

• A racing or irregular heartbeat (palpitations)
• Feeling constantly anxious, irritable, or nervous
• Shaky hands (mild tremors)
• Losing weight or failing to gain weight during pregnancy
• Feeling hot and sweating a lot, even in an air-conditioned room
• Severe nausea (jee michlana) and vomiting sensation (ubkai), beyond typical morning sickness

What Are the Risks? For You and Your Baby

This is the part that worries most expecting parents, and it's important to be straightforward. Untreated thyroid disease, particularly hypothyroidism, can increase risks for the mother. This includes a higher chance of pre-eclampsia (a condition causing very high BP), anaemia, and preterm delivery.

For the baby, since the mother's thyroid hormone is crucial for early brain development, an untreated deficiency can affect the baby's neurological and cognitive growth. But let's be very clear: these are the risks of an undiagnosed and untreated condition. With timely diagnosis and proper management, these risks are brought down significantly.

Diagnosis is Simple: The TSH Test

Finding out if you have a thyroid problem is not complicated at all. It just involves a simple blood test called a TSH (Thyroid-Stimulating Hormone) test. In many parts of India, this is now a routine part of the blood work done in the first trimester of pregnancy.

If your TSH level is abnormal, your doctor will likely order further tests (like Free T4) to get a complete picture. If treatment is needed for hypothyroidism, it’s usually just a single, small pill of a hormone called levothyroxine, taken once a day on an empty stomach. This medicine is a synthetic version of the hormone your body is missing, and it is safe for the baby. Your doctor will monitor your levels every 4-6 weeks and adjust the dose as your pregnancy progresses.

If you have any of the symptoms mentioned, don't just dismiss them as 'part of pregnancy'. It's always a good idea to discuss them with a qualified healthcare provider.

Frequently Asked Questions

Is it safe to take thyroid medicine during pregnancy?

Yes, it is not only safe but essential. The medicine for an underactive thyroid (levothyroxine) is simply replacing a hormone your body needs but isn't making enough of. Not taking it is far riskier for both you and your baby. Your doctor will prescribe the correct dose.

I have thyroid issues already. What should I do if I get pregnant?

If you are already on thyroid medication and planning a pregnancy or find out you are pregnant, contact your doctor immediately. Do not stop your medication. Your dose will likely need to be increased as soon as the pregnancy is confirmed to meet the higher demands.

Will my thyroid problem go away after delivery?

It depends. If the thyroid problem was pre-existing, it will continue after delivery (prasav). If it developed during pregnancy, it might resolve, but it might not. You'll need to be monitored after delivery to see if your medication needs to be adjusted or can be stopped.

Does having a thyroid problem affect getting pregnant?

Yes, both underactive and overactive thyroid conditions can interfere with ovulation and make it more difficult to conceive. If you are having trouble getting pregnant, getting your thyroid levels checked is a very common and useful first step.

Medical Disclaimer

The information provided in this article is for general informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this article.

Related reading

• Thyroid Surgery Cost in India: A Typical Price Guide
• What Are the Early Symptoms of Liver Problems?
• Uterine Fibroids: Symptoms and Treatment Options