TSH
Plain-English guide for patients and families.
TSH is a screening test for thyroid function. Untreated hypothyroidism can affect cycles and pregnancy outcomes. Target ranges in pregnancy are tighter; levothyroxine is common when indicated.
Who is tested
Often included in pre-conception and infertility baseline labs, especially with irregular cycles, RPL, or symptoms.
AI Information
EducationalThyroid dysfunction is one of the most common endocrine disorders affecting women of reproductive age, and even subclinical hypothyroidism can impact fertility and pregnancy outcomes. Current guidelines recommend TSH screening for all women undergoing fertility evaluation, with a target TSH of <2.5 mIU/L before conception and during the first trimester.
Key Points
- Subclinical hypothyroidism (TSH 2.5–10 mIU/L with normal T4) may affect ovulation, implantation, and early pregnancy.
- Thyroid antibodies (TPO) can be present even with normal TSH and may independently affect IVF outcomes and miscarriage risk.
- Levothyroxine is safe in pregnancy and the dose typically needs to increase by 25–50% once pregnancy is confirmed.
- Hyperthyroidism also affects fertility and pregnancy — Graves' disease requires careful management before conception.
- TSH should be rechecked every 4–6 weeks during the first half of pregnancy to maintain optimal levels.
Who Should Know This?
All women planning pregnancy, those with irregular cycles, patients with a personal or family history of thyroid disease, and women with recurrent pregnancy loss.
Clinical Context in Pakistan
TSH screening is part of every fertility evaluation at IVF Experts Lahore. Dr. Adnan Jabbar ensures thyroid levels are optimised before starting IVF or other fertility treatments, with ongoing monitoring during pregnancy.
Important Disclaimer
This AI-generated summary is for educational purposes only and should not replace professional medical advice. Always consult with Dr. Adnan Jabbar or your fertility specialist for personalised clinical guidance tailored to your specific situation.
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