If you have been trying to get pregnant and it is not happening, your thyroid could be one of the reasons — and most people never think to check it.
Thyroid problems are extremely common in Indian women. The tricky part is that many women have thyroid issues without knowing it. The symptoms are easy to miss or blame on something else — tiredness, weight gain, irregular periods. But when it comes to getting pregnant, even a mildly imbalanced thyroid can make a big difference.
Dr. Sonu Balhara, IVF & Fertility Expert at ART Fertility Clinics, Gurugram, checks thyroid levels as part of every fertility evaluation. In her experience treating patients from India and countries like England, Nigeria, Iraq, Bangladesh and Japan — thyroid is one of the most commonly found and most easily corrected fertility problems.
What Does the Thyroid Do?
The thyroid is a small butterfly-shaped gland in your neck. It produces hormones that control your body’s metabolism — how fast or slow your body works. But it also directly affects your reproductive system. The thyroid influences ovulation, the menstrual cycle, the quality of eggs, and the uterus’s ability to support a pregnancy.
When the thyroid is not working properly — either too slow (hypothyroidism) or too fast (hyperthyroidism) — it can disrupt everything needed for conception.
How Does Thyroid Affect Fertility?
Hypothyroidism — Underactive Thyroid
This is the most common thyroid problem in women. When the thyroid is underactive, it does not produce enough hormones. This can cause:
- Irregular or absent periods
- Ovulation problems — eggs may not be released properly
- Poor egg quality
- Difficulty with embryo implantation
- Higher risk of miscarriage in early pregnancy
- Fatigue, weight gain, hair loss, feeling cold all the time
Hyperthyroidism — Overactive Thyroid
When the thyroid produces too many hormones, it can cause:
- Very light or very frequent periods
- Difficulty conceiving
- Higher risk of premature birth if pregnancy is achieved
- Heart palpitations, weight loss, anxiety, sweating
Subclinical Hypothyroidism — The Hidden Problem
This is where TSH levels are slightly elevated but T3 and T4 are still normal. Many doctors miss this because it looks ‘borderline’ on paper. But for fertility, subclinical hypothyroidism can still interfere with ovulation and implantation — and it is very treatable.
Dr. Sonu Balhara specifically looks for this in patients who have unexplained infertility or repeated failed IVF cycles.
What Is the Ideal TSH Level for Getting Pregnant?
Normal TSH range in general is 0.5 to 4.5 mIU/L. Many fertility specialists, particularly for women with thyroid antibodies or hypothyroid symptoms, aim to optimise TSH before IVF. Note: ASRM’s updated 2024 guideline clarifies that the specific TSH target is an individual clinical decision. The following points reflect common clinical practice, which your doctor will personalise:
- A TSH of 3.5 might look ‘normal’ on a standard report
- For women with thyroid antibodies or symptoms, treatment may be considered even when TSH is within the standard normal range — your doctor decides based on your individual profile
- Many specialists target TSH optimisation before IVF, particularly for women with known thyroid conditions (Source: ASRM Subclinical Hypothyroidism Guideline, Fertility & Sterility, 2024)
If your TSH is above this level, it can usually be brought down quickly with a simple daily tablet — Levothyroxine. It is safe, effective, and inexpensive.
Can Thyroid Problems Be Fixed Before IVF?
Yes — and this is exactly why it matters so much to test early. Thyroid imbalances are among the easiest fertility problems to correct. A simple tablet taken daily can bring TSH levels to the optimal range within 4 to 8 weeks.
Dr. Sonu Balhara recommends that any woman planning IVF — or trying to conceive naturally — should have her thyroid levels checked as one of the first steps. It is a small test that can save months of failed attempts.
Thyroid and IVF: What You Need to Know
- Thyroid is checked as a standard part of fertility blood tests at ART Fertility Clinics
- Patients already on thyroid medication should inform their doctor — dose may need adjustment during IVF stimulation
- Thyroid levels are also monitored during early pregnancy, as requirements change
- Both hypothyroidism and hyperthyroidism need to be well-controlled before embryo transfer
Thyroid After Getting Pregnant
Once pregnancy happens, thyroid requirements increase. The baby depends entirely on the mother’s thyroid hormones during the first trimester. This is why thyroid monitoring continues throughout pregnancy — not just during fertility treatment.
Women with thyroid conditions who are well-managed have healthy, normal pregnancies. The key is that it needs to be monitored and adjusted as the pregnancy progresses.
When to Get Your Thyroid Checked
You should get a thyroid test if:
- You have been trying to conceive for more than 6 months without success
- Your periods are very irregular, very light, or very heavy
- You feel constantly tired, are gaining weight without reason, or losing hair
- You have had a miscarriage — especially more than one
- You are planning to start IVF
- Someone in your family has a thyroid condition
The test is a simple blood test. It costs very little and takes one day to get results. There is no reason to delay it.
Dr. Sonu Balhara | IVF & Fertility Expert | ART Fertility Clinics, Sector 38, Gurugram | Personal Clinic: Sector 46, Greenwood City, Gurugram | +91 9811409586 | sonubalharaivf.com
Conclusion
Thyroid is one of the most common and most easily treated causes of fertility problems — yet it is one of the last things most people think to check. A simple TSH blood test can give you an answer in 24 hours, and treatment is straightforward.
If you are trying to get pregnant and have not yet had your thyroid checked, book a consultation with Dr. Sonu Balhara at ART Fertility Clinics, Sector 38, Gurugram. Do not spend months trying without the full picture.
