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To pursue MSc in Endocrinology after completing BSc you need to ensure that your BSc degree includes relevant subjects such as Biology, Biochemistry, Physiology. After that look for universities or institutions that offers MSc programs in Endocrinology. Check your eligibility criteria for MSc programs in Endocrinology for each institute before applying.

Some universities may require you to take an entrance exam as part of their admission process so do look out for that.