Background: International guidelines recommend using local trimester-specific normative data for TSH (thyroid stimulating hormone). However, there are no unified Indian data for the same.
Material and methods: This review collates recently published data from various Indian centres and discusses the state of trimester-specific TSH ranges in the country.
Results: The authors describe the strengths and limitations of available data, and support the need for pan-India data.
Conclusion: To ensure effective screening and action, harmonized research is necessary to establish national normative data for TSH in India.
Keywords: Hashimoto's thyroiditis; India; TSH assay; hypothyroidism.